Buying low, selling high is very hard to do. Particularly if you are new to it. It is a recipe for losing money tbh.

If you want long term exposure to stocks but dont have much knowledge on it then an index tracker or Exchange Traded Fund may be your best option. (I have a couple of trackers invested in the S&P 500 and an All World Tracker.) It is what I wish I knew about 10 years ago - top up as I go, and keep them indefinately.

As with any threads like this, none of us are qualified to give advice so it is important to do your own research to form your own decision.