I think you'll do great on Winstrol. Personally you can also have Masteron if it's available. Primo is also another good one too. Again if it's available.
I wouldn't push too much when it comes to using these types of steroids. Testosterone and dianabol will definitely add a lot of water retention. So that's what you want to watch out for.
To be the best in anything you've got to believe in yourself. You'll be surprised how many people out there don't believe in themselves. You've got to really push yourself hard.