Won't Start need advice, Please read....
Hard to say
In this injection world, do you have any experience with carburetors? I'm not trying to be "funny."
First, once you mess around with the throttle, you may have upset the choke "set."
The choke might be gummed up and not working (sticking partially or all open)
The carb may be gummed up, dirty, and the idle circuit may be plugged partially or completely
You might have a "cracked" vacuum hose, and have a vacuum leak, causing a lean condition
Often you must pump the throttle to cause the accel pump to shoot some fuel in there to start. If you are trying to start it with "hands off" the throttle no wonder it won't run.
Let me ask you..........do you know what to look for visually, IE how a choke is supposed to work "cold?"