I sold my computer and bought about 0.006 bitcoin.
For the rest of money, I saved them in my bank account.
I hope this decision is right.
It seems that everyone is optimistic about the Bitcoin price and the forum got full with Bitcoin noobs posting meaningless forum threads.

OP, nobody gives a damn about what you sold and how many BTC you have bought. Just do your thing and good luck with your Bitcoin journey. This is a really tiny amount of BTC. Do you expect to become a millionaire overnight by making such "grandiose" Bitcoin investment?
Just keep HODLing your coins and don't panic, when the price crashes(it will crash sooner or later). Don't get involved into any "crypto investment" schemes offering your ridiculous profits and don't get involved into crypto day trading. If you keep this advice you will be fine.