[U-Boot] Porting New Board

Hey guys, I am new to u-Boot and New to porting android software / bootloaders ETC,... to new hardware.

I Posses the 2 following samsung devices, 1) The Samsung Tab Pro 10.1 SM-T520 product name Picassowifi and 2) the Canadian d2LTE qualcom Galaxy s3

I desire to port u-Boot to the SM-T520 and I have just this side of no idea where to start. Could anyone help me out a bit and get me started?

My Dev environment is a Ubuntu Vm on my laptop and I have downloaded quite a few different resources and toolchains already for compiling android software.

Thanks, David Nelson