The recipe I think I used is equal quantity of sugar and fruit. For sloe gin you can use any bottle with a screw cap I save the empty gin bottles. For damson gin, because I have a number of damson trees I use demijohns, but any wide mouthed jar will do. You just need to be able to get the fruit into the bottle/jar fairly easily.
Ideally you should keep it 3 months before drinking. If you can make enough try and keep some for 3 or 4 months and see how it compares. The recommendation is not to leave thd fruit in for more than 6 months.
The first Christmas I made Damson gin, I poured the liquor into a small bottle (again anything with a screw cap will do) and we ate the gin soaked damsons with cream for pudding. When I tried it again the next year the damsons were not very good - I think it depends on how ripe and sweet they are to start with.
If you don't like very sweet things then cut down the sugar, particularly with the damsons. You can always add more when you bottle it.