I've lived in the UK since I was 2 what would be next steps?
OK to start off with my mother moved to the UK with me and my sister in 2006 when I was two years old. I’ve spent since lived in the UK all my life and have never traveled out. I was born in Nigeria and since I haven’t gone back there, since the last Nigerian passport I ever had was from when I was two. For the first eight years of living in the UK, we were living here on an expired holiday visa. However, after a little while we were able to get on a limited leave to remain visa. I obviously have no idea what it’s like to live in Nigeria. I have lived most of my life in England and although I know I’m not, I would consider myself a British citizen. so we have been on the limited to remain visa since around 2014 renewing every 2 1/2 years I’m now currently 22 and at some point I would love to be able to go university and be able to apply for for government grant for student loan however, I can’t do that as we’re still waiting to process other stuff. I wanted to know as someone who doesn’t have a Nigerian passport. I only have a Nigerian photocopy birth certificate and that’s the only thing that tie me back to my home country. What steps do I take now to becoming a British citizen or at least being put on a Visa that isn’t required a 2 1/2 year renewal and with allow me to apply for grants for university. Thank you what do I do?
Edit- Also any tips or ideas on how to do it in a budget friendly way as were pretty broke and saving up 3k before August/September doesn't seem possible