There have been solo teams before, some have been quite successful. Hopefully you have support from parents or friends even if they are not officially part of your team.
Lots of vexforum members will be willing to answer questions if/when you run into problems.
Surely you remember 1103 from Round Up, that was a solo team that won both World skills challenges and was a divisional champion at Worlds. There are several other solo team people (past and present) on these forums that can help you out.