Gotta get in shape!

So with my sister's wedding just about 6 months away, I have decided that I need to get in shape. I'm not overweight or anything like that, I'm just not a fan of exercise and therefore not "fit". I eat a butt-ton of junk food but I apparently have a high metabolism because I don't gain alot of weight from it. This makes my husband (and quite frankly all my female friends) pretty batty. But when I thought about turning 30 next month and then having to wear a knee length, strapless bridesmaid dress next to six other bridesmaids who would all be in their 20's, I came to the stark realization that I need to try to nix the batwings and flabby thighs. I'm starting out SLOOOOOW since I've never had a regular exercise routine. I'm far from in shape so regular push ups are out, but I really wanted to get some tone to my arms, so I started doing wall pushups. Which, by the way, my almost-8-year-old saw me doing this morning and informed me "Momma, you're a cheater! That's NOT how you do pushups." Then he proceeded to to about 20 man pushups without missing a beat. Brat. Anyway, I do 25 of them every morning and again every evening. I do 5 sets of 10 lunges per leg throughout the day, and I also 25 calf-raises (no weights) and 25 cross body crunches (standing not lying down) in the morning and again at night.
I have been at it for a little over a week and I haven't keeled over yet. I never believed people when they said exercising gives you energy, but I do now! I am not as dog-tired at the end of the day like I used to be, and I can definitely feel that my quads and my calves are getting worked. I have a bunch of exercises pinned on Pinterest for my booty and my abs that I plan on slowing integrating in next week.
I don't necessarily want to loose any weight, just tone up. I'm hoping that by the time July rolls around I'll have some dang-good looking arms and legs for a 30 year old bridesmaid!
If you have any weight/machine-free ideas for me that have worked for you PLEASE let me know!