Hey Silasimo, welcome to the forum!
Flourishes are hard whatever size your hand. Don't be put off by this as you will get them down like everyone who takes this path and sticks with it. I have very large hands and some flourishes have been quite the challenge for me, however, after putting in the practice to learn them properly and not trying to rush by going through the motions slowly, it gets much easier and speed comes with time.
- Daryl's Encyclopedia of Playing Card Flourishes
- Royal Road to Card Magic has nice basic flourishes
- The Encyclopedia of Playing Card Flourishes
just to name a very small few (there are many out there) as a starting place are good options.
Personally I am a fan of Jeff McBride's '
Art of Card Manipulation'
&
'Genesis v1' by theory 11 artist Andrei Jikh, that you can find here:
https://store.theory11.com/products/genesis-by-andrei-jikh
Just start out by trying some basic flourishes and slowly moving to the next level, you may not quite be on the same playing field as people with larger hands, but having small hands it's by no means a handicap.
Good luck and have fun!
S°