This is the correct way to do it.

Money sitting on a savings account loses value. Buy stocks, indexes or ETFs with the money instead. The penalty for getting the money back is capital gains tax.

This was always my approach - as soon as you get a pay rise, increase the amount going to savings.

Never had it, don’t miss it.

As for how long to leave it in savings, totally different question and depends on what you want from life.