We're not able to provide personal support for general issues you might run into when creating content for VRChat, but in addition to our documentation (https://docs.vrchat.com/), there are tons of resources for you to check out! You can check out the various channels on the VRChat Discord (https://discord.gg/VRChat), the VRChat Ask Forum (http://ask.vrchat.com/), or the plethora of tutorials available on YouTube.
If you think you've found a bug in the SDK, Please make a report on the feedback board! Our team actively monitors this site and uses it to help keep track of issues: https://feedback.vrchat.com/sdk-bug-reports