It’s actually probably harder these days to build something that isn’t RoHS compliant as a hobbyist than one that is. The vast majority of what you can buy from Digikey and Mouser and whatnot will be compliant, PCB shops will mostly do lead-free HASL (though you’d want ENIG anyway if you’re going to use a stencil), and lead-free solder pastes are more common than leaded ones. Basically you’ll probably have to either use old stock parts or pull some really old solder out of the fridge as a hobbyist to end up with lead.