You don't say where you got the 1700-2000 figure but I suggest you use the NHS BMI calculator to find a recommended range and aim for the upper half of the range. It may well be higher than you expect nhs.uk/live-well/healthy-we...
This welcome pack includes a link to the NHS 12 week plan. It's entirely up to you how you use your calories on this plan so you do your own planning and I agree, doing some batch cooking and having something in the fridge or freezer is a better use of time and ingredients healthunlocked.com/nhsweigh...
There is plenty here to support you and I would particularly recommend joining a weekly weigh in on the day of your choice, and using the Daily Diary to log your meal plans. All directions for how to find your way around are in the welcome pack.
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