university is stressful

i feel a bit stupid cuz im always stuck at a 2:1 or Bs and I rlly want to get As/a 1st on my assignments. i do get some As but my grades seem inconsistent. idk, I'm trying I guess. but I feel super dumb cuz I have always wanted to be a scientist but I feel like I cant be a good enough scientist if I'm not getting the best grades  I know 1st year doesn't count but I want to be on top of it all now so Im confident I can get a 1st next year

I have an assessed practical on Monday and I'm super scared idk what to expect but I reeeaaaallllyyyy hope I do super good

I seem to be super good at group presentations and good with some exams but I am crap at lab reports!