This is some great advice!
1. Don't wait too long to try and learn everything about investing (I spent more than a year testing out everything and could have gained a year's growth - you can never beat time)
2. Invest in index funds (I have tried my luck with some single equities and have just mostly failed, currently I am sorting out my portfolio to sell off sh!t I bought and convert all to etfs)
3. Don't over diversify with too many etfs (pick a few and stick with them - mostly offshore US, WD etfs)
4. I don't do any RA as working outside ZAR (zero benefits for me) - also have a fear to leave all monies up to the government to decide their fate
5. If you do borrow money from your savings, pay it back with interest as you would with any bank or financial institution (helps not buying stuff you don't need)
Be patient the first couple of years growth will mostly be money saved and invested.