I’d start really simple. A good burr grinder and either French press or pour over. Personally YMMV on French press vs pour over, but I tend to enjoy the taste and feel of a pour over coffee. If you have a set budget spend as much as possible on the best quality grinder. You’ll notice the biggest difference in taste, texture and brew from a grinder (IMO).
Also, buy a scale. You’ll want to start doing everything by weight now. I’m sure people can give you way more in-depth responses than mine, but this is my easy slide in to the world of coffee brewing. One day you’ll end up like the rest of us buying $6-700 single dose grinders and trying to math their way into the best cup of coffee every morning. It’s a lifestyle choice for sure.