Starting to fly

Hello guys I'm a 19 year old guy from Portugal just now starting to fly. I have 4.5 hours and I feel amazing though i feel bad about some things. First of all I feel like I can control the airplane well and d the things the instructor tells me well but I just feel that he is not with me or just doesn't trust me. I do stupid mistakes or I think I do..I really just can't get hold of the pitot cover and I never do it right I can never cover the pitot tube.but I found a technique that might just help me. Couple days ago I couldn't get my seatbelt right and it was my fault because I was unlatching the whole seatbelt system instead of putting them together. I feel I can control the Cessna 152 well but I just do stupid things on the ground...I feel like he is not trusting me.