Hi
I started coding at 27 and am doing well despite the late start.
If you like coding keep investing in growing your skills and try to get a job/internship at a place that aligns with your interest.
If you enjoy it it’s a great job with great money, and you get to learn about whatever domain you’re coding for. IMO it’s an implementation skill and having a solid academic background in biology would still make you a more effective biologist