There's lots you can do without any specific equipment too.
Air squats, goblet squats- hold a weight to your chest while you air squat- can be anything you've got- pack some things in a smallish bag if you want some more weight. Pantry items are good. You can squat to a chair if you want. You can also hold the weight to your chest or overhead (depending on your choice of items- don't recommend an unstable weight overhead) to lunge with on the spot, or just bodyweight- whatever works for you. Can also fill two carry bags with the same weight and either take them for a walk or stand on the spot with them- it's a good test of grip strength.
Pushups (from your knees or your toes- from your knees is totally ok), burpees, mountain climbers, hip bridges.
There's lots of core exercises you can throw in too- situps, hollow rocks, planks- on your front or side.
Make sure you do some stretching. Even doing some yoga is good too if that's something for you. If you're not sure how to do a movement, there's loads of how-to videos on youtube.
There's a lot of good apps out there that you can use to generate a different workout each time. Yoga apps, whether you're beginner or advanced, and apps that will work as a timer to count down or for intervals. A search of "no equipment workout" will give you endless combinations as well to keep things interesting and make sure no two sessions are the same if you are someone who needs variety.
Make sure you put some music on. Whatever makes you want to move and work to your ability.
I'm a cross fitter. I've been walking 3km (working back up to running after an injury and physical illness) each morning this week, and practicing my handstands against my living room wall.

I'm trying hard to make a habit of it. I'm struggling without the gym being open. It's easier for me to motivate myself to physically go somewhere to exercise than to do it at home. I'm easily caught in the "I'll do it later" trap.
Really though, nothing about it needs to be complicated, it's just finding what works for you.
Manners73 wrote:Fast walking, skipping or hula hooping are all fun ways to get your heart rate up and also to raise your body temperature.
I want to go find a hula hoop now.