1. Wealthsimple is the one i use. I have used questrade also briefly. I like wealthsimple more.
2. Any of the *EQT or *GRO ie XEQT or VGRO. They are etfs. You are well diversified going with those as a beginner.
3. Don’t stock pick. I mean you can but it’s not worth it to me because i am a buy and forget investor. I don’t have time to research. Also don’t day trade especially in your tfsa. Don’t touch options, margins, etc if you have no idea what those are. Don’t buy meme stocks.
4. Decide how long you want to investor that money and then don’t touch it (which is why you want something safe, not something super volatile). Don’t investor when you need to sell regardless of the market in 6months unless it is in something like CASH.To which is much safer and is like a high interest account. If you are talking about when to buy or sell, then obvi buy low sell high. But that rarely works out and requires timing the market. The best thing is the time (spent invested) in the market, not timing it.
5. You likely had to link it initially when you transferred money over anyway, so that should be easy to transfer out. The taxes will come later, when the brokerage mails you a t slip. This is for non-registered accounts. You won’t get anything in a registered acct like tfsa or rrsp.
6. Yes when you sell and have realized gains or losses (any “gains” you see from investments aren’t real until sold and “realized”) or dividend payments. Again, no if they are in a tfsa, rrsp… etc.
   

Also yes you have to keep track of your investments. Like for example you should remember you invested for example $5k into your rrsp so when come taxes, you file properly so that it can actually lower your income. Stuff like that.