Maybe you should put a condition in the user input telling that the skills must be separated between comas…
In that case, the Output of the user input will be able to split. Splitting the output with comas, you will have an array.
Using this array you can fill the Excel columns.
PS: Its just a fast idea that I though
Also, you can ask for 1 input, then paste the output in the Excel, and repeat it “X” times… if the user doesnt write an input, you can end the process… as you want… there are always to many options