Yes, we can use 'experience' in the plural. However, it is important to realise that the countable meaning of 'experience' is different from the uncountable meaning. The word "experience" has two different meanings and two different sets of grammatical rules. 1. In its uncountable form, 'experience' refers to accumulated knowledge and expertise, or the amount of previous contact or involvement. For example, "I got the job because I had experience in the sector." Being a mass noun, it has no plural form. You can use it with no article (as above) or with a definite article or determiner (the, my etc) but not with an indefinite article (a/an). 2. In its countable form, 'an experience' is a significant thing which happened: a notable incident or occurrence that you have witnessed or taken part in. For example, "I had an interesting experience at the bank yesterday" or "I had many interesting experiences when I was travelling in South America". Being a countable noun, it has both a singular and a plural form. In its singular form, it must be used with an article or determiner. I hope that makes sense.

It depends. I have experience in this field. I have experience living abroad. I have experience working in the meat industry. Life is about making experiences. Experiences make us who we are. I had many new experiences in Spain.