Not amateurish at all, but good questions. I’m not confident enough to answer your second question, but on your first question: yes, you can use the hosting service you already have. Given that you are renting a VPS that is. It looks like Strato is calling this “hosting”. Don’t use their “WordPress hosting” package for this though, as it won’t allow you to install the instance software.

14,99 a month. Since I’ve subscribed to brickborrow I’ve not bought any set myself anymore

Even after reading both the blog and the website itself I still have no idea what this is supposed to be? Is it a standalone git client that tries to do things differently? Is it a GitHub alternative? I’m super confused

If you like it old-skool-style, wizordum just got released in early access. There’s a playable demo as well

Absolutely this. I didn’t have either of those, but successfully used a Windows virtual machine on my Mac to do it

Controversial opinion maybe, but: pay for your apps/subscriptions. The makers need to feed their families as well. If you don’t want to pay big corporate, or the app doesn’t offer an ad-free alternative, switch to an indie alternative instead. If you can, pay for a lifetime plan.