If there was anybody who shouldn't have been surprised or doubted Jesus resurrection, it should have been his disciples and people who spent time with Him.
They saw countless miracles, they saw him even raise dead people back to life and He told them He will be killed but He will rise after 3 days, WHY DIDNT THEY BELIEVE HIM?
Most of us are in this same situation, God has promised us a lot in His word and we see countless proofs in other people's life, yet we still doubt God..
God's word never fails, If He said it, it is according to His capacity, so He is super capable to bring it to pass.
Just believe