Hi and welcome to iMore.
If ALL you are using it for is what you say, then yes, 16Gb will be enough.
Personally, I always went for the 32g version as I found out that, over time, 16Gb was just not enough for me. Now they have removed the 32Gb version, I get the 64Gb version which is MORE than enough for my needs.
Think ahead on how your usage may change and bu accordingly.