I know when I review portfolios I don’t look for their website skill (and typically assume they just use a template regardless), as that is not what you will be hired for. Simplicity is great for ID portfolios because it is your work I want to see, that’s what makes the 3x3 grid templates so popular, make your work stand out from the others. It is great to learn web building skills, but I don’t think it is necessary for your applications unless you are applying for a web design job.