What are easy and trustworthy options and tips?
Newbies should first understand a little and then decide whether to buy Bitcoin by paying attention to security aspects. First of all, you should read good reviews and decide. In case of buying Bitcoin, never invest a large amount of money in the crypto space at once. Try to invest a little by little. If you learn step by step and move forward while paying attention to security aspects, then there will be no problem.
What kind of advice is this? Never buy large amount of Bitcoin and buy little by little, who made that rule? What if OP already knew the risk and he is asking for the best way and safe method to buy Bitcoin instead of this advices you are given him. I will rather be concerned by the money he is using and not the amount he has to risk. What if OP is using money he borrowed or money that is so important to him and then he decided to put everything on Bitcoin.
To OP, check your country where you are coming from, if Bitcoin is friendly in there you can use any decentralized exchanges where you can use p2p method, it's simple like the rest of the exchanges but you will never be required to undergo any KYC registration. However, if you don't have any means of buying and centralized exchanges is what you have, you can buy there but don't keep your Bitcoin in there, buy and transfer them to your personal wallet. You can get a hardware wallet for yourself, it's very cheap and secure than software wallets.