ur position is hopeless. Kb3 is a good move for white here. even if u win the exchange the passed a pawn will win the game for white.
My 2nd OTB tournament game

But if Kb3 then I could have got rid of the passed pawn.
If he pushes the pawn straight away then I think it would have been hopeless.

After 41.Kb3 Bxa5 42.Kxa4 you're just a rook down, which is hopeless.
41.Kb3 Nc5+ 42.Kxc3 Nxd7 43.a6 Nb6 44.Kb4 and the king just walks to the knight, then the pawn promotes.
But pushing it first looks hopeless as well, yes.
I played my 2nd ever OTB tournament game recently and lost on time. I played as black. I know I made a few blunders, but is my position here hopeless or did I have a chance for a draw if I hadn't run out of time?
Thanks for any comments.