as a newbie, i don't know where to buy bitcoin and trade it from, i hope you can help me
You can see bitcoin in coinmarketcap(dot)com because the price of bitcoin is in good condition so its better to buy in good exchanges that you see also in coinmarketcap.
You can begin using CMC then study how things works before making any decisions in investing from this Market, plan your investment and make good assumptions don't allow yourself to go inside without any proper knowledge, you can do your study using the internet, watch some videos from YouTube and begin to learn.