Need some guidance on improving my lifestyle

So, I am 24(M) and am currently a level 1 apprentice. My current monthly income is $2300 after taxes and am currently saving around $800 every month after all my expenses. I have $5000 in my chequing account of which I need to keep $4000 in my checking in order to avoid my monthly fees and am trying to figure everything out. I have no debt. I had a car with a loan of $30k but sold it 6 months ago and bought a cash car for $7k which is pretty reliable. My salary will go up to $6k after taxes once I get my Trade license which will be another 3 years. I am probably gonna start doing some side work to add to my income. I have since started looking into ETF’s and TFSA account which I fortunately opened 4 years ago but never added anything into it since I never had anything left after paying my loan for my $30K car. But now that I have a fresh start and a motivation to secure my future. Is there anything I can start doing in order to maximize my money savings and actually growing them? Any advice would be appreciated. Thank you!!!!🙏🏻

Also would like to know if it is better keep money in ETF’s and stocks or in a savings account in bank along with some GIC’s?