How to finish booties

Hi all. I just finished a new pattern I got for baby booties and it turned out really cute. Quesition: I have never sewn a seam before and I need to sew the sole and backseam. How should I do this? I looked at the beg. vids and I saw the kitchner stitch, but Amy did that with the stitches still on the needle. HELP!!!

I’ve knitted booties before like this and the way I did it was to put them right sides together and just whip stitch them around, weave in the ends, then turn them right side out. Hope this helps.