Check out Airalo. Its an app that lets you download e-sims from pretty much any country. They also offer regional and global e sims. I’ve pretty much swapped to only using esims when i travel for the convenience factor but sometimes I buy a physical sim if its cheaper and I’m in a place for more than a couple weeks.

For business advice I’d tell myself to be more stringent on who to give equity. Loyalty and friendship are valuable but keep business decisions separate, value your time and energy, and pay yourself a salary for your time!