Ok I have tried to figure this all out on my own honestly but it is just doing my head in. So I am hoping that someone who knows how this all works can help, pretty please

So I have calculated that my
TDEE 2796
BMR 1804
I have my calorie goal set at 1630 but I usually eat around 300-400 more a day as I eat back about half of my exercise calories. I only eat back half because I don't have a HRM and I am not sure how much I trust various phone apps, MFP calculations and so on.
So my question is, have I got this right. I have hit one plateau back in March but at that point I was only eating 1200 calories and it was obviously way too low. So I have increased it. I am currently still losing so I guess that is a good sign but I am dreading hitting a plateau again so I was hoping to avoid that by getting it right first time in.
I have a lot to lose and I would like to try to lose 2lb a week for a while longer, once I get under 200lbs I'll be happy with a 1lb a week loss. I mean I am obviously happy with any loss every week but would prefer to see it come off at a rate of 2lb.
Currently I am not eating particular clean and I am not paying much attention to Macros. I need to get my head round this first before I can figure that side of things out and again I think that is something I will focus on more intently once I am under 200lbs.
I would be grateful for any help, advice, opinions and sure if my question has seemed inane and annoyed you go ahead and give me a slap. I can take it lol!