Trading app/ platform for S&S, ISA’a and index funds

[Superwomann]

Hi there,
I am clueless and have a lot of, no doubt stupid questions, if you can bear with me..
I’ve got a s&s junior isa each for each child, HL and Onefamily. No particular reason for different ones other than that I liked what they offered at different times.
I’m looking to start monthly savings in both s&s and index funds for myself but also topping up the kids isa’s. Is there a platform where I can see everything at once? Or is it maybe better to move the kids money to the same isa? If I use for example AJ bells app can I view my HL isa?

Are there any experts out there on compound interests? I’ve been told if I invest in “ boring, safe, index funds” monthly, maybe just even £100, I should make a big return in 20-30 years time. What are your thoughts?

Would you invest lump sums into s&s ( when I get a bonus for example) and monthly into an index fund?

What are your thoughts on crypto? If I had invested in bitcoin in 2010 when my friend told me about it I would be very wealthy now 😆

Thank you for reading!

I'd move away from HL, they charge high fees. I don't know about the other firm. You potentially need to think about two sets of fees - one to the investment platform (HL etc) and another to the particular investment product you buy on that platform. It's a bit like paying your bank just to be with them, then another charge depending on which account you open.

I'm with Invest Engine, if you did want to go with them I've a referral code which would give us both a bonus
https://investengine.com/referral-welcome/?utm_medium=share&utm_source=growsurf&grsf=9tvu4k

In terms of choosing what to invest in, unless you believe you can beat the market (you might occasionally, but you usually won't) index trackers are a good option. They are low cost. Something like a vanguard global tracker might suit for your long term goals. Vanguard FTSE developed world charges 0.12%. These videos explain things well
https://youtube.com/playlist?list=PLXy71rkGuCjXLg9N8zowwUpXCYfBcMJFK&si=1W0z41Lva1Wgx6wO

Good luck