as a newbie, i don't know where to buy bitcoin and trade it from, i hope you can help me

if you don't have coins or tokens at all. The first thing you have to do is deposit with fiat money in your country's market. second, you can buy bitcoin and trade. this is very simple,
As for that depositing , hes going to need to use Luno or Paxful to buy bitcoin. Luno is best, cause its already an exchange and you can deposit fiat to your wallet and use it to buy Bitcoin or Ethereum and also exchange back to fiat anytime you want to. There is also an option to withdraw back to your bank account if you wish to. Not really everyone knows about Luno , there are other bigger exchanges that has been around before it, but it still has good reputation. Binance is a good one, and Coinbase, Kraken,
.I will recommend Bitbuy (formerly InstaBT) for anyone that is living in Canada.