If you are looking for people to take your project seriously, dont use sentences like
"i will try to help with the landscape! i'm kinda good with textures n' stuff"
Also, going for open a world game as your first game, is a pretty bad idea. Start off with something single that has a good gameplaymechanic(s) that is engaging and try to set a goal thats actually reachable. Open world games in the triple A market have millions of dollars shoved into with teams of devs and artists working on them. You are not going to compete in that martket. You must do the ground work, everyone has ideas.
Approach the project realistically, it doesnt seem like you're doing that right now.