Bear in mind also that with any healthy eating plan you adopt, you'll need to be able to more or less keep it up for the rest of your life, if you want to keep the weight off after you've lost it. Only you will know (or find out) exactly what the right plan is for you.
I had my second baby 18 months ago. At 5 foot 10, was a little over 17st just before I gave birth, and on January 1st 2020, still weighed 15 and a half stone. After having (less significant) weight issues on and off my entire adult life with a tendency to yoyo, enough was enough, and I went full on "new decade new plan"
I thought I'd have to give a lot of things up cold turkey for good, and for a time, I did. I also took up c25k, which I credit as being incredibly helpful as I like to run 5x per week now. But as I lost weight, I realised that I needed the odd tiny treat each day, so that I could fully commit to the running and rest of my modified diet.
My personal treats are a PhD Smart protein bar or similar after lunch, and one small LoveRaw vegan dark chocolate nut butter cup after dinner. This equates to about 300kcal, which would be seen as a terrible idea by some on here. But to me, having nothing at all wasn't sustainable, and giving myself fruit, carrots or similar that I didn't really want in the first place would have led to me finding something less suitable to eat on top of that (as I have to keep a well stocked cupboard for my husband and kids!)
But a bit of what i fancy works for me. I now weigh a tad over 11 stone, and am a healthy BMI. Having the right snacks in repertoire was instrumental in this. I also relaxed my eating habits over Christmas, and if it's a special event, e.g. Valentine's Day, I'll also eat exactly what I want. But for one night only.
With this in mind, balance is key. I think there are people who are happy to give up snacks to lose weight, and people who are happy to modify them for the same aim. It's worth trying out both ways to find out which one you are.