Trying to stop consuming 5000 calories a day

So I calculated how many calories i consumed and it was 4500 – 5000 a day, I’m not that fat at all, I look like a normal guy when I have clothes on, and a bit chubby without them, I gained 15kg of weight since the pandemic started , 10 of them were in the first 3 months, before the pandemic I used to go swimming in a local swimming pool, but obviously b cuz of the pandemic it closed, and now it still haven’t opened due to financial issues, so I haven’t done much workout in the past 2 years, and there are no gyms/other swimming pools anywhere closer then 100km , and now I started feeling a bit lazier and my body shape is getting worse, so I started trying to consume no more then 2000 calories a day, but I feel really hungry all day and after every meal I stay hungry, and I’m not enjoying meals as much as I did, my meals were so dense and filled with fat and junk stuff, like every meal I ate had abt 1500 cals, and I ate the equivalent to a 4th meal between them, and I’m not counting drinks I drank with meals or side dishes, any tips to feel less hungry during my day ?
And what are some foods that would fill me up and has low calories?

Btw I eat vegetables and fruits quite often too, like my food isn’t exactly junk food, but it has a lot of cals, and I eat almost everything

Trying to stop consuming 5000 calories a day