Kiwi Issai pruning first year

I bought a kiwi last year, had some decent growth in the first year. Now that it is spring it is time to prune but I’m not sure how to proceed as there seems to be two solid branches at the base.

Any suggestions or tips greatly appreciated.

Thanks!

I don't know kiwi personally, but I wonder if it's a good opportunity to divide the plant in two.

Not sure that is possible but thanks. I understand I need to have one “main” trunk but not completely clear how to do that with this particular plant.