Welcome to the bitcoin community and congratulations on your first buying of 0.01 BTC current rate makes it around (344$l which is too much but I assume, you did some lump sum here and is planning to do DCA by investing $100 per month. Which is a good start, many will say you are late, you should start buying BTC when it was in the range of $24k to $30k.

But do not lose hope, because it is still an early time to start accumulating btc even though you are really late, but you can still make profits out of your investments. Your age does not matters here, all that matters is your knowledge of btc, if you have more knowledge than a millennial then you can make more profit then them. Overall, you have to be consistent and should have some plan in your mind, so that you won't be played by small profits that you might see on your investments.