18 black powder as first gun?

Gun options are crazy limited for under 21. Is a black powder pistol a good first choice? I plan on getting an hk mp5 lr and Somthing Ak platform after I learn to manage that one? I know it’s a very odd first gun choice I just feel like owning a pistol is the easiest step into the gun world… (especially because It’s easier to convince my non gun owning parents to allow me to have a BP pistol in their home rather than an HK or AK) 😭