Getting healthier can be easy if you focus on getting something done, rather than the details. It doesn't matter what you do, as long as you move: any movement is better than no movement! Here's a simple check list for a healthy workout week.
1. A little movement every day!
Try to get a bit of movement in to your every day life. It can be as simple as walking, cleaning, relaxed cycling - whatever really, as long as you move. A minimum of 30 minutes per day is a good target and can be spread out over the whole day.
Stand up and walk about a little every hour. (Besides doing good for your health, it will keep you more energized and happy).
2. Strength training once a week
Use some weights if you can. You can make your own by filling plastic bottles with water or sand. There are tons of free videos online and I'm happy to give ideas as well.
3. Cardio a few times a week
Again, it can be something simple as walking/jogging or dancing around at home. Just bring up the tempo/intensity a bit so that your heart races faster and you get a bit of a sweat on. A general tip - the more often you get your cardio on, the shorter you need to do it. Short and often OR long and rare, which way works for you?
Don't get caught up in details, just GO FOR IT! For NHS's full recommendations on exercise, see this post. In summary - it doesn't matter what you do really, just move! And remember - anything is better than nothing.
Best of luck!
Online Personal Trainer