Asklemmy

Do smaller workouts in the morning. Get yourself into shape first. I was like you. Just even riding my bike one big ride a week and some very very short (1km round trip with a small hill) rides almost every day. It got me stronger and more able to handle the big rides. Now I get runner's high after cycling. I also know my limits better

Start slow and build up. 15 minutes of elevated heart rate is a good starting point. Don't kill yourself when your starting out, you'll either burn out or injure yourself.

Rest days are important, this is when your body rebuilds and gets stronger whether that is your heart and lungs for cardio or other muscle groups for weight training.

If your baseline exercise is zero it might take longer than you want to build up your stamina to where you don't feel exhausted all day. BUT it will get there.

Motivation is not reliable DO NOT rely on this to keep you going. Determination is the key to consistently exercising. If you don't want to do your exercise one day do it anyways. Even if you half ass it. A half assed day is better than a no assed day.

I find the mornings work best. I tend to take naps if I'm feeling tired, usually in the afternoon

I do mornings. You get used to it!

I am having the same problem with working out. Either I am pooped out for the rest of the day, and or I am too sore to go the next day.

One thing I know i am doing wrong is nutrition; working out without decent "energy" from food (protein, carbs, fats, etc). I am told you only burn so much fat for the energy.

I just figured out my macros (a plan to lose weight and give some energy for the gym) and I am now planning meal prepping.

Also water, I know I an not drinking enough water.

The next thing I need to work on is sleeping. Not getting a decent night's rest and then working out wipes me out.

Hope this helps!