Sexual Health Relationship Questions

CW - oral sex discussed 

My partner loves giving oral, and will go down on me every chance he gets (even when I just get home from work and I'm not at my peak of freshness). The issue is I don't reciprocate in the same way. For one I don't really like doing it, but I want to please my partner. The other part of that is that I'm self conscious about it because I don't know if I'm doing it right and I get in my head about it and get performance anxiety. He says I'm doing good but I sometimes wonder if he's just saying because some head is better than none. Any advice is welcomed.