Getting in to Marine Conservation

Hi, I hope someone can help.
I'm 23 years old and have been out of education since I was 15 due to being ill with Coeliacs.
I'd like to have a career in Marine Conservation, but at the moment, I only have my Maths GCSE. Regarding GCSEs, I need to do English, Biology, Chemistry, Physics, Geography, and perhaps Computer Science.
I know Biology is essential for A-levels, and I think Chemistry is a close second. Do I do Geography as well? I'm just unsure.
I've looked at university courses to see their different requirements, but I don't want to get too far ahead of myself yet.
The main thing I'm looking for guidance on is doing GCSEs as an adult. I've signed up to do GCSE English evening classes at my local college, but it's the sciences I'm worried most about. I've done a lot of research on online GCSE courses, but so many negative reviews are concerning. I do understand if being online is a must for someone in my position; however, if I could do some GCSEs in person, that would be my preference. I've seen Southwark College do a 1-year triple science course. I don't know in which direction I should go.
I would really appreciate any help or guidance on gaining GCSEs, suggestions on A levels, or anything else.
Thank you.

Hi, I hope someone can help.
I'm 23 years old and have been out of education since I was 15 due to being ill with Coeliacs.
I'd like to have a career in Marine Conservation, but at the moment, I only have my Maths GCSE. Regarding GCSEs, I need to do English, Biology, Chemistry, Physics, Geography, and perhaps Computer Science.
I know Biology is essential for A-levels, and I think Chemistry is a close second. Do I do Geography as well? I'm just unsure.
I've looked at university courses to see their different requirements, but I don't want to get too far ahead of myself yet.
The main thing I'm looking for guidance on is doing GCSEs as an adult. I've signed up to do GCSE English evening classes at my local college, but it's the sciences I'm worried most about. I've done a lot of research on online GCSE courses, but so many negative reviews are concerning. I do understand if being online is a must for someone in my position; however, if I could do some GCSEs in person, that would be my preference. I've seen Southwark College do a 1-year triple science course. I don't know in which direction I should go.
I would really appreciate any help or guidance on gaining GCSEs, suggestions on A levels, or anything else.
Thank you.

Hi, I hope someone can help.
I'm 23 years old and have been out of education since I was 15 due to being ill with Coeliacs.
I'd like to have a career in Marine Conservation, but at the moment, I only have my Maths GCSE. Regarding GCSEs, I need to do English, Biology, Chemistry, Physics, Geography, and perhaps Computer Science.
I know Biology is essential for A-levels, and I think Chemistry is a close second. Do I do Geography as well? I'm just unsure.
I've looked at university courses to see their different requirements, but I don't want to get too far ahead of myself yet.
The main thing I'm looking for guidance on is doing GCSEs as an adult. I've signed up to do GCSE English evening classes at my local college, but it's the sciences I'm worried most about. I've done a lot of research on online GCSE courses, but so many negative reviews are concerning. I do understand if being online is a must for someone in my position; however, if I could do some GCSEs in person, that would be my preference. I've seen Southwark College do a 1-year triple science course. I don't know in which direction I should go.
I would really appreciate any help or guidance on gaining GCSEs, suggestions on A levels, or anything else.
Thank you.