Too scared to import features

Hello,

I would like to add a couple of filters with variants quickly thru Excel - can I just clone those that exist as (text with variables) and turn them into filters (whats the command here?)
My export looks like this:

A different feature excel someone sent me looks much more complex like this

The 1st looks much easier to work with to be honest

Can I leave Deature ID No empty?

I just tried this with excel sheet 1 and got this error

Error Incorrect feature type ‘T’ of the ‘Zolltarifnummer’ product feature. The product feature was skipped.

For every data set although thats how they were was exported originally

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