Pamela, welcome to the forum.
Reading your first post, you are juggling alot on your plate. Work, study, kids, hubby, animals.
You adding running, yoga and cycling to your list.
The first thing to do is plan your week. Making sure your time is planned so everything fits.
You have alot to deal with and adding extra can lead to tireness and stress. So please
plan your week. I would start by running once to twice a week. Start with 1 mile, then
progress when you feel ready. Don't push yourself. So will gradually start to feel the
benefits as you progress.
Cycling to work is excellent. Depending on the distance. Very sensible to do this
once a week. But if you feel the benefit, increase this to two a week. Remember, it
takes time and progress to achieve your results.
You have priorities which takes up your time. Work, study and family are the prime examples.
If you find time for getting yourself fit and strong, then good for you. But please don't
push yourself which could undermine your priorities.