Don't be worried now my friend, I pointed out the challenges in your chart, and these can be overcome. The good part about them is that when an adverse aspect in a horoscope is overcome, the reward is great empowerment. The most powerful, mysterious, interesting and attractive persons I have come across in my Life are Sun-Pluto individuals. All my love objects have strong Plutonian aspects to the Sun and Ascendant. Pluto is so interesting you see - it is the favorite planet for many, and doubtless the most magnetic. Pluto people never fail to interest me.
There are alot of strengths in your chart as well.
You've "indulgent aspects" in your chart, therefore I thought you perhaps needed advice in this matter. It is good that you started gym. Clear out your head and focus on the external World also, don't indulge in introspection, at least not too much. It literally Changes your brain structure. You will see Amazing results when you come out of your head a Little bit.
I Think your Sun-Pluto Square plays a crucial role in overcoming the opposition from Saturn. Pluto in the 7th can be tough. It usually mean that your partners, business Associates etc, are powerful persons. Your mars is trine your midheaven, could denote a career in something physical. Muhammad Ali and Sugar Ray Robinson had Mars in aspect to Midheaven. Moon is also aspecting your midheaven, with an easy trine. Do you get help and support from women in your Life? Women, and your emotions, could help you achieve your ambitions. Mars is trine to your ascendant as well. You really have a lot of "masculine" aspects in your chart, Sun in Leo don't forget. Leos doesnt like to be pushed around, if they are shy and insecure its usually due to some inhibiting factor in the chart - in your case; Saturn opposing your Sun is most important. I suggest you read a Little about this aspect. It gives burdens and troubles, and delays, but if you can manage to be as tough as you seem to be, taking your positive aspects in account, you can pull it through and reap the rewards. Saturn is what causes most sorrow in Life, most hardship, but the lessons of Saturn gives also the best of rewards.
Mars is in your 5th house of fun, love and creativity, so you surely should try to exercise a lot, and once you get used to it, I'm quite sure that you will like it.
Your North node, your spiritual mission in this Life, the way to happiness, is in Sagittarius. Your mission is not to be some sophisticated and cultivated person, but to be your own, and explore this World in your own way, through journeys, philosophy, etc. You have been a typical citizen, but in this Life you will have to wander a Little, like a Sagittarius, in order to be truly fulfilled. How this journey takes expression only you can know.
With Aries on the 12th house cusp, and Moon in it, you are sensitive, but also very secure of yourself ONCE you feel secure - then you're the boss. This security you will have to develop further, so that you can shine as much not just in your own, private and safe World, but in the outside World as well.
A lot of will Power, as is Always the case with Sun-Pluto, and Pluto-ascendant.
Sun-Pluto for both my parents manifested as struggles with authority. My mother came out as half-loser, half-winner, and so did my father. But they both survived the crisis, came out of it transformed, and my father in particular is greatly empowered today - he can go through any crisis with steadfast determination and unshakeable faith. But you will have to be cautious with other people, especially with those in authority. You could also attract a dominating, jealous and controlling partner, or you could perhaps play this role. So many people with Sun-Pluto Squares get into trouble with the police at some Point in their lives, or state authority of some sort. I just studied Marlon Brando's chart and he got Sun-Pluto Square. This I've seen in so many charts, and Robert Hand, a famous astrologer, writes that this is the case for Sun-Pluto people. But remember, authority does not necessarily mean police, or the state. It can mean a boss, a partner, parents, anything. The reason why these people get into trouble is due to the fact that they are really forceful personalities themselves, Deep down. Pluto represents Power, and with the Sun, there is Power struggles for sure.
How is your relationship with your father? Sometimes these aspects (Pluto and Saturn to Sun) can mean problems with father figures. The father may have been weak, or too Cold, too demanding. Perhaps you have felt that you have been punished more severely than others in your Life.
But remember - I highlighted the difficulties now. When you overcome this opposition of Saturn, the sunny Leo inside of you will awake, and the houses (4th and 11th) will undergo a kind of rebirth. An improved family Life, a more secure inner Foundation and better friendships will be the result.