My first salary as a Youth Corper in Lagos was N20,000 in 2010. And by the end of my NYSC year, I had saved N50,000 while feeding, clothing and transporting myself with no other income. The only basic expense I didn’t cover was accommodation because I lived in a place already paid for. Now N50,000 over 12 months might not seem like a lot but remember this was 21% of my total annual salary at the time. Most financial gurus and experts counsel that you save at least 15% -20% of your income.

So how did I do it? Loads and loads of discipline for starters! Here are some tips that also helped as well:
https://theladysroom.ng/how-i-saved-on-my-20k-salary/