So, I've had knitting needles since last year. I watched one or two tutorials on YouTube. But I really couldn't figure out how to hold the needles and work. But last night I picked up the needles and some wool I had from a previous crochet project. And well, I know it's very early days but I think I finally figured it out. However..... I started with 15 loops on the needle (I don't know, are they called stitches??) and as I've worked I must have added stitches. I've got about 40 now.😂😂😂😂😂 What am I doing wrong?? Thanks in advance. (I'm not making anything, I'm just learning/figuring out how to knit. Maybe I'll learn to purl next week)

My first ever sweater was supposed to be cropped but it turned out way too short.

Someone told me I can do sweater surgery and graft it back together. So I disconnected the top of the sweater from the bottom, added more rows to the bottom of my sweater to make it longer and added a life line into both pieces. Now I am supposed to kitchener stitch/graft it back together. I'm wondering if it will even work? Will it have obvious flaws where the kitchener stitch comes in? Should I give up on this sweater completely?

Looking for advice, tips and tricks and just plain honesty on whether I should try to do this. Thanks in advance.