Said all I can on the computer stuff Moggy and agree with TuBy and Guffer

I don't know if you have freecycle up in your parts but you may find somebody who is turfing out a old PC for nothing. If you was closer, i've got a few very old towers which you could probably make something usable out of

As for the money shite, i've been there and eventually come out the other side mate as has a few on here

I believe Al (Harris K Telemacher) is probably the most current on the rules and regulations.
I ended up a friggin mental wreck over it and tbh, a few on here suffered with my rants I came out with

All I will say (because I don't know your circumstances) is this ................
No matter what threats these financial oppsers come out with, they can't take what you haven't got.
Once you get your head around that, a lot of the stress goes out of the window

As Al recommended, ring Stepchange and the Citizens Advise Centre for starters and just be 100% honest (no matter how embarrassing) with them and if by any chance your ex military, pick up the phone to the Royal British Legion because they saved my arse when I was in a VERY Very dark place.