You should start on what is available and allowed exchange in your country, so that you will not have any problem, list all the license exchange in your country and start their create the account, kyc if needed, and fund your wallet with usdt and buy some bitcoin.
Be careful on fake link of an exchange they might stole your funds in your exchange if you were given a wrong link, good luck
If I was in a position to advise, the best place I would probably advise anyone to start is by using a trusted and widely used exchange which works in their country. For example, for someone in Nigeria, platforms like Binance or Bybit are usually the most reliable and easiest platforms to navigate as a beginner and they also support the P2P trading which mean you can buy bitcoin directly using your local currency on the appreciate without stress.
What I guide many of beginners to do is create an account, complete verifications which are required then use the P2P platform to firstly buy USDT with the local currency then use the USDT to purchase or convert it to bitcoin. It is something which works very well for our own community here. The next advise I used to give is simply for you to be very careful with security using the 2 factor verification and other methods of security Protections.