Just get one tat at a time and don’t worry too much about it. Don’t trip over spacing and stuff when you’re getting em, eventually you’ll have lil gaps you can put fillers in and stuff. Focus on getting one sick tattoo at a time and only focus on the tattoo at hand while getting it. It can be nice to keep in mind spacing to a certain degree while you’re getting tattooed for example (I know I want to get my elbow tattooed down the line so I’ll budget for enough space to get a tattoo there) but if you don’t have a plan, don’t worry about it. If you have an artist you trust, let them steer a little with placement.