Well, i also classified my self as a newbie, let me share something for you.
1. Learn things from newbie section, it can gives u a lot of information. Read and learn.
2.. Bitcoin is main crypto currency, and the first, it already survived a lot of situation, so you must put your trust in it more than other coins.
3. There are ways to earn bitcoin such as, mining, investing, trading, working, gambling, etc
4. Use a good wallet. People suggests using a hardware wallet for a best security.
5. Dont regret what already happen in the past, learn to make better future from your mistake.
That is some thing i want to share, and what i have learn in the early time of mine. In my opinion there is no late word to invest, and bitcoin is suggested by many people can reach a higher price, and some suggested it will reach 100k usd, it is over 10 times of the price now, so there is still more room to get profit (well if it happens, it is still a prediction, that i would like to see to happen). But remember, always spend what you can afford to lose. Investing in things is good, but to make it a successful investment, it is up to the investor, so you as the investor, need to learn and make your investment better for you, like maybe, you try to traading or something, or you just can hold bitcoin and wait till the price goes up.
For source of knowledge, you can search it on internet, but i suggest you read on this forum, and you can get something too from youtube i guess.
Good luck for you, all of us are newbie on the start, but it is up to us if we want to be a newbie forever, or strive to be a greater person.