I would go to your local library and search for books on canning. They will give you recipes and answer questions such as blanching. One thing I would recommend is to make sure your jars are warm before putting them in boiling water or else they might explode. If I recall correctly, blanching cooks the food enough so that it can freeze and can properly. I believe green beans need to be cooked 8 minutes. I could be wrong since I have not tried to can in 10 years, that is why I recommend using your library.
You could do a word search on canning using salsa and canning as your key words. Hope you do well. We canned tomatoes and tomato juice and froze green beans in milk cartons (not the plastic kind) when I was young. I have frozen peppers. Even dried them and fruit such as bananas.