Ello! I currently have a frined whos going to send me some green bud wood for growing my own lemon tree on a rootstock, but, I don't know what to use for a rootstock.

Next thing is I have a orange tree I started from seed and it's about 3 months old now and I don't know what to do with it.

So, ja, also, I've never done any grafting, ever. But I was thinking of doing a T graft on whatever rootstock.