Please. Help Me, I'm a total novice.

So, I'm very new to gardening, it all started a few months ago when I went to a Mexican restaurant (Wahaca, it's delish) and as a nice touch at the end they gave everyone a little packet of chili seeds, I planted them that weekend in old food tins I found in the recycling bin and stuck them up in a little plastic greenhouse at the end of my father in-law's garden as me and Chris are currently 'between home's, being a relatively newish member of my other half's family, his clan all naturally assumed I was interested in gardening, which resulted in relations bringing me other seeds they had at home, shoved away at the back of the kitchen draw. I got tomato's, spring onions and radishes. I thought what the hell, there is something fun about it, and I planted all the seeds in a variety of improvised tubs and watered them whenever I remembered, or about every other day.
 Within a month it looked like there was a jungle in the mini greenhouse, the plants were growing too big for their pots, there was a little outbreak of some sort of white fly all over my chili's, I'd added over the weeks a seed tray of cherry pips and the tops from a punnet of strawberries sprinkled with some soil which were now sprouting.
 Even as an inexperienced gardener it did cross my mind that August was a bit late to start planting such an array of fruit and veg but I got completely carried away in the excitement of seeing things actually growing especially after the success of my radishes.
Now I am halfway through September, my tomato's and chili's are yet to flower, well enough produce fruit and all my plants are probably going to perish during the miserable English winter. I have however discovered, that although I have a lot to learn, I could potentially be 'green fingered' or referred to by that tarnished term a 'gardener,' or at least willing to learn?
 I am adopting that past time of the over sixties and/or hippi eco warriors with holey brown jumpers.

 Although I'm sure I have had a few raised eyebrows from my extremely unoutdoorsey, ready meal eating friends who's flagstone gardens are only there to have a fag, and who are yet to see my usually manicured nails chipped and dirty. I'm quite liking the idea of growing my own veg though, especially being a vegetarian, I just hope that next year I will actually be able to eat some of it!
 Now I'm off to Selfridges to find myself a brown holey jumper....