Do it! If you follow your passion it will add sooo much to your life.
I'm a kindergarten teacher in Victoria and I'm not arty at all. Each teacher brings their own strengths and passions to the groups of children they teach. I beat myself up for years for not being arty after a supervising teacher wrote about this as a weakness. Last year a new graduate teacher talked about finding what your passionate about and nurturing that.
So I may not be good at art but I'm fantastic at anti- bias, anti- stereotype, inclusion, teaching children advocacy, emotional literacy, reflection, relationships with children and families.
I stretch myself to provide artistic experiences for the children because I understand the value of if as a means to communicate ideas but you don't have to be good at arts and crafts to be an awesome teacher and make a real difference in children and families lives.
Btw- I thought I wasn't smart either but when I got a Distinction for my first assignment it changed my self concept.
I went on to graduate after 3 years study in the top 2% across Australia that year with Deans Honours.
You can do this!