Starting investing late - how would you accelerate?

I'm 49M. Most of my adult life the money went elsewhere - obligations, studying, the house - so I'm starting the serious investing part late and I know it. State pension only starts at 67 and it'll be small like 1k + inflation. I want to stop working at 60, roughly 11 years to build, then a 7-year gap to bridge before any state pension. Where I am: newly built energy efficient house (I pay like 50eur for heating in the coldest months for heating) without a mortgage + I have an apartment in the c