Any tips/help

I know that these are my own insecurities & I need to overcome them just trying to maybe get some tips or encouragement.

my bf & I have been together for awhile now & I think I might need ideas to spice up sex. I feel like we do the same thing every time. Maybe new positions?

-I also never take off my shirt bc of my boobs they’re small & I’m really insecure about them & it’s not like he’s never seen them idk what it is

- he’s also way more experienced than me so I get nervous about giving head bc what if it sucks & he hates it