Engine rebuild due - DIY?

[Brunoandrade98]

So, my engine will soon be due a rebuild due to low compression.

Dry VS wet compression test indicate piston ring wear and compression figures are a consistent 120-125 while dry across all 4 pistons.

I was wondering how much of a ball ache it would be to do a DIY rebuild, although I'm not yet sure what the rebuild will consist of, but I am potentially looking at forging it. It's a while I'm in there sorta thing...

My questions are:

1. Is a DIY rebuild (realistically) achievable for a DIY enthusiast like myself? - To put things into perspective, the most difficult engine job I've done so far was a successful timing belt change
2. Is forging a lot more difficult than a refresh? - Obviously more work if I'm changing things that wouldn't need changing for the sake of an upgrade, but is it more difficult, requiring more niche knowledge and tricks?
3. Apart from your normal tools (spanners, sockets, torque wenches...), what specialty tools will I need? - I already know I'd need stuff such as feeler gauges, piston ring compressor, etc...but surely there's a lot more

Any input appreciated before I go balls deep into this

Anyone is more than welcome to question my sanity.