Hi Chrissie, welcome to Merry Moot.
I myself lacked confidence to perform spells (up until quite recently) and my advice would be to have a go, as this is the best way to learn. I would start small, so with perhaps a small candle magic spell and then work up to bigger, more elaborate spells (when and if you feel the need to).
However, is there anything in particular that makes you feel apprehensive about performing spells?
"Luck is my middle name.
Mind you, my first name is Bad."
- Rincewind (Discworld)
Annie is feeling: