Need advice/guidance on what to do in my particular situation

Hi guys.

Long story short, I want to invest and see what I can do to help my money grow.

I get paid weekly, around £268 a week, and that's furlough pay. My main bank account is Monzo and paying my bills is super easy, as I have pots with each bill name on them, and every week when I get paid, I put 25% of the bill amount into the pot, so by the time the bill comes out, I don't have to worry about not having enough. That gives me security. However, this sometimes leaves me with less than £50 for myself. I can live with that because I'm single and have no kids, but that amount of money is what I think stops me from being able to invest into anything. Unless I'm totally wrong. This is why I'm here, I suppose.

I used to have a non-existent credit file (thin file?) so it was impossible to get a credit card. However, over the last 12 months, this has changed and I now have a credit card. I've been using it responsibly, as I read the fine print on everything, like interest-free period, etc. Not sure if this is at all relevant but I thought I'd mention it.

I have various apps but I haven't done anything with them, Revolut, FreeTrade, CoinBase, NiceHash, Trading 212 and more.

Read a lot about Vanguard S&S ISA, and things like that, but like the apps mentioned, I need advice and guidance on what's best for my particular case.

Any advice will be truly appreciated, and I'd like to say thank you in advance for taking your time to read this.