Charging international customers as a solo founder used to terrify me. It's genuinely easy now.
Stripe handles the currency, tax, and compliance headache. I went from "I can't sell globally" to first overseas customer in a weekend. The infrastructure problem you're scared of is mostly already solved.
The biggest lever for my retention wasn't a feature. It was the empty state.
New users opened to a blank screen and 70% never came back. I added one pre-filled example and a single line of copy explaining what to do next. Retention doubled. No new code, just less confusion.
Look at your empty states. First thing every user sees, usually the last thing we design.
Been heads-down on an email warmup tool for months. It's finally good enough to show. Would mean a lot if you took a look and told me the truth.

First $100 day today. Not MRR — one hundred dollars in a single day, for an email warmup tool I almost deleted three times.
I know it's small. But I've been building for years and this is the first time strangers paid me for something I made alone.