a lot of the awkwardness goes away if there is a shared activity involved. If there is shared activity or shared interests to begin with, focus will be on those subjects without having to venture out into "weather" "politics" or other uncomfortable and less easy topics to navigate. If you know ahead of time that you will be called on to socialize with people, carrying "props" such as a book you are reading, a drawing pad, (and you can play paper games, word games, etc using this tool), you can bring a hand craft to do, or a couple magazines, adult coloring pages, hand held video games, string ( do you know how to do cats cradle and Jacob's ladder puzzles with string, for example). You can bring chalk and do chalk art.... lots of things can be used to share an activity with another person.
Of course some of these things depend on the social situations involved. Drs offices or funerals, for example...would not be good places to try this. But a family reunion, a group get-together, and many other situations may be fine.
I have a series of scripted responses for basic qusetions others ask "how are you" ?, "whats new"? and that sort of thing... there is also something called selective mutism that takes over for many of us when suddenly faced with questions or demands (even polite demands) to respond when we are not prepared to. For those times you can carry a little card that explains what is happening. All OK.
Everybody feels awkward and tongue tied when interacting with some others. Its OK, and its OK to tell others you are anxious or feeling awkward, etc. the other person might be feeling awkward too, and might agree with relief.... yes this is awkward! I find I do better now near the end of my lifetime than I did when I was younger. Practice and experience have helped over the years.