It's good to see you are interested in investing in Bitcoin. Before jumping into investing, you should learn a lot about Bitcoin. Since you joined the forum, you are in the right place. You can take lessons from this forum; just use the search button when you need to know anything. Otherwise, you can raise a thread if you aren't satisfied with the search result.

Simply search for what is the DCA strategy on the web, and start accumulating in the DCA strategy. I will advise to buy a hardware wallet that is open source, like Trezor. Otherwise at least use a non-custodial wallet to store your funds instead of trusting a centralised wallet or exchange. So less chance of losing your funds.