Worried about weight gain

Am I juicing wrong?

I sometimes still eat sometimes don’t. When I juice I use like 8/10 carrots, pear, 4 apples, watermelon, celery, cabbage, beetroots. If ate that all that’s a decent amount of calories ( 800/1100)

I drink this over Apox 1.5 days.

Love carrot juice! So I make the base mire carrots than add in the bitter stuff like cabbage to mask it.

Is it possible to gain weight doing this? I don’t want to gain and I’m on a glp1 medication atm, it’s more of given up smoking and now coffee so want something to give a little pick me up