Hi friends,

please help me with this simple grammar: ...my first experience was / were?

"Experience" is in the singular, so it's "was".
If I want to talk about my first experiences.............

The verb is 'are' .

In the original question the word has the countable nature; so you could write the plural.

If you want to talk about skills, this is different.

I have some experience of networking. I can't say that I have experiences of networking