Toc toc; ? permit ?? can I come in ??

Hello everyone!!!!!
I recently joined and I hope to be in the right section for me to introduce myself; my name is ann I am a mechanical/electrical repair shop and I do this job for several years but every day I discover that I still have to learn many things.
Today, the passion is not enough pi?; with the electronic tools and information that sometimes are not easily available.
This forum seems to give some hope........

Good day to all !!!