[justaguyhere]

I am doing the first two, but no clue about the third. Any tips on where I should start?

[hatboxreappoint]

Vanguard FTSE Global All Cap Index Fund

https://www.mrmoneymustache.com/2011/04/10/post-4-what-am-i-...

[marketgod]

Look up Bogleheads and Lazy Portfolio.

[kratom_sandwich]

I think if you have a genuine interest in this topic and some basic understanding of maths (probability, etc.), textbooks can be quite accessible. Read, for example, "Coporate Finance" by Berk and DeMarzo or have a look at the CFA study material.