All the choices you have to make can be very daunting. I was very lucky to have a colleague at work who gave a talk at the right time in my life with some plausibly right choices.

In the UK I started out using https://www.charles-stanley-direct.co.uk/ and later moved to https://www.ii.co.uk/. I initially invested in https://www.vanguardinvestor.co.uk/investments/vanguard-life... which is a fund which is available on a bunch of platforms. These days I recommend https://www.vanguardinvestor.co.uk/ to some people as an easy and low fee way of getting started with Vanguard funds in the UK.

I don't know what the best trading platform options are in Switzerland - it looks like all of the ones I'm familiar with are not relevant to you.

The key thing is you want to minimise two types of fees: * Platform fees * Product fees

For example Charles Stanley Direct charge 0.3% platform fees, and https://www.vanguardinvestor.co.uk/ charges 0.15% platform fees.

Vanguard LifeStrategy® 100% Equity Fund charges 0.22%.

The bottom line is that there are lots of good choices, and the main thing is to make a choice and get started. You can always optimise/improve your choices later.