try soaking the corks in warm water and sanitizer then they should go in real easy let the bottels stand up-right for afew days 3 or 4 to let gas escape or
corks may push out a littel then turn on side they shuold be fine then
there are very good wine kits out there if you look for them they make very good wine but grapes are much better this is the right time of the year for wine
between now and mid october