Since you don't have enough knowledge about investing in Bitcoin, do enough research and gather a lot of knowledge about investing before you invest. Everything you need to know about your investment. And before investing first prepare yourself for full investment. If you get a salary of $300 per month, if you invest $50 in bitcoins out of that, you can very well serve your family and all your personal expenses with $250. You don't need any exact time to buy bitcoins, if you invest in long term you will definitely get profit. Just invest for long term. If you continue to invest in Bitcoin in this way, you will surely achieve great success in life.
And good luck to you
Simply don't do anything that you don't know in the market. The market is a very dangerous place for those who are pressured to make money. If you present you wallet or coins, the market will be willing to take that from you and you have nothing you can do about it. If you're going to buy an altcoin for greater gains, make sure you've done your research and it is not just a coin for pump and dump.
Having enough money is enough enough. You have to be very smart and discipline when you are engaging in the market.