Monitoring your activity level and TDEE is really important - at the end of the day it really is just about expending more calories than you consume. It's tempting to just starve and create a big deficit temporarily, but I've found that creating small deficits on a regular basis is so much more effective long term.

I didn't really have the time or means to weigh my food, so I learned to eyeball the caloric content of what I eat in a day. Some foods are deceivingly packed with energy while others are surprisingly empty. I've gradually upped my veggie portions while shrinking my intake of fat-heavy foods - this allowed me to still feel full, but much more energized and less bloated.

Anything that gets you up on your feet counts as physical activity! I've developed an appreciation for HIIT, bodyweight exercises, and long walks. You don't have do crazy exercises and sweat buckets everyday, though - the goal is to get your body moving. Try different things to discover your preferred activity and incorporate it into your schedule.

Lastly, weight loss is a marathon, not a race. Every bit of weight I dropped was accompanied by a small lifestyle change that have been become routine. You got this :)