Hello
I'm hoping someone can advise me on what sort of exercise plan I should start with.
I am 43 and have 2 young kids, have hashimoto's (hypothyroid), am on anti-depressants for anxiety, and really have very little get up and go. My anti depressants were reduced a while ago and I feel like maybe I need to have them increased. I also have very low levels of vitamin D. My knees hurt if I do lunges correctly and I have a damaged arch in my foot. I used to feel much better when I regularly exercised but that was mostly through classes at the gym. I can't afford this anymore so am looking at a cheap and cheerful option that will get me results to get fit and to feel more 'alive'. I've really let things get to me and feel like they've taken their toll on me. I'm really sorry if I sound pathetic :(
I run around after and with my kids and have fun doing that but am always a bit sad by how easily I get out of breath. I have started to walk a bit more but need something to get my heart rate going a bit more. If I try and do one of my exercise videos I find it difficult to find the time and motivation. If I do manage one I always feel a bit dizzy or just unwell. I think that maybe it's just too much at the moment and i need to get a bit more fit first. But don't know how. 
If anyone can point me in the right direction and how to start, that would be great.
Many Thanks in advance.