i can use gimmicks but after the effect is done everything is clean
i also have problem of fearing of getting caught if i did 10 tricks perfectly and one trick is caught i will not be happy with my performance
Forgive me but it sounds like you're new to performance. That fear goes away the longer you perform and realize that it's not the individual tricks that people remember, it's how you made them feel overall that they remember. Half the time people will forget a portion of the show, and mix the stuff they do remember together. Like the spectator who told Wayne Houchin that it was really cool when Wayne pulled a length of thread with needles tied onto it out of his eye.
I'm going to re-emphasize that pure sleight of hand is probably what you want to focus on. Ring magic is great because you can carry the prop (your ring) with you without it being a 'prop'. I use stuff from Peter McKinnon, Garrett Thomas and Justin Miller for ring work. Coins are very similar and easily borrowed - just work on coin sleights for a while and any time you can find smallish, flattish, roundish objects you can work miracles.
There's also a whole host of 'body magic' where you do things with just your own person. I haven't studied any of this, though, so unfortunately I can't give you any leads for that.
There's a lot of rubber band tricks as well, other than CMH, that involve little to no set up. Marcus Eddie is good for that stuff and I know there's been a book or DVD set mentioned that focuses specifically on rubber bands. I have no idea what the name is, though, sorry.
That's all I've got for now. Good luck.