I kindly want to ask for advice and tips on how to get around here in the beginning?
You need to read every bits of informations provided to you concerning that right from the start, read them, check on pinned threads, read them as well, ask questions when necessary, make use of the forum search engine, don't plagiarize, often read more than making post as a beginner, you will find this platform more interesting with time as you continue to learn and grow.
Where do I buy Bitcoin in the best website without being scammed?
If you don't mind on giving out your informations for KYC, you can make use of the centralized exchanges, but if you can't afford for that, you should make use of a decentralized exchange, but make sure that you research well about how reputable anyone of them is before using.