Hey bud, good to hear you’ve already been putting in some effort. Going down to 1800 cals for fat loss isn't crazy talk. Going much lower is common. you can use cardio to off set your deficit further. I start someone with slow steady state cardio but if they don't respond well, I increase it to HIIT. Also you need to look at your time frame. You stopped training and probably stopped eating a bb diet when you stopped training 13 years ago. Its going to take a long time to get your metabolism in order. Maybe you were able to remove a few carbs in the past to get an effect but you’re body hasn't been on track for a long time, you probably don't have the muscle mass you did before and of course, you are older. So for sure, you will need to reduce calories further and push that much harder than before to get good fat loss