Foreign investment considerations

With Schwab making a crypto etf, I wanted to get my account out of Schwab into a different account. For now, I'm going with Fidelity.

One reason I wanted to do that is because Fidelity (to my layman understanding) offers better choices and options for investing in foreign markets/bonds. I've been curious about it for a while, and now seems a good time to do it.

From an american perspective, what sorts of things should I keep in mind in terms of taxes? Recommendation for resources to read and educate myself further?

Additionally, one of my preferred investment methods is to refer to etf portfolios for a collection of 'safe' positions to research deeper. For instance, I'd reference just the fact of which stocks make up VOO but find the positions I'd actually like to invest in. But use the makeup of VOO to start with. I don't have a specific thing against buying etfs, but...I don't know, instinctively they feel odd, I don't like not 'owning' my positions.

But any recommendations of non-american filled etfs I can start that process on?

In terms of foreign markets/bonds I'd be interested in, primarily looking for EU centered ones.