Do not under any circumstances allow yourself to be emotionally blackmailed into getting baptized. Your future self will thank you for it.
Just put them off with "oh I would like to be 100% ready when I do that, it's such an important decision. Jesus was 30 when he got baptized and I think he knew wha he was doing, don't worry about me I'll get there...." blah blah blah they will be reassured by your mature attitude and leave you alone for a while.
Be confident and act like you know your own mind and you know what you are doing and they may let up a bit.
Just remember baptism = accountability. The pressure won't lessen after baptism it will increase.