It’s easy to install plugins directly on WordPress. Go to ‘Plugins’, ‘Add New’, search the plugin you want, install it, activate it, and done. Please noted that you will need to pay US$59 / year for ‘Elementor Pro’, but it’s worth. The rest plugins just go for the free version are absolutely fine.
Besides, remember to register an account on Google Analytics (GA) and Mailchimp. GA allows you to track and analysis the performance and data about your online portfolio, such as the number of people who visited your website, the location of these people, etc. For Mailchimp, it’s an external customers relationship management system (CRM), you can enjoy a free package for the first 2,000 customers contact. It allows you to manage your online portfolio subscribers, create e-mail direct marketing campaign (EDM), and analysis the performance of each campaign.
I suggest you better spend more times in experiment on this part, study and try out some basic functions of each plugins. Of course, there are so many other useful plugins on WordPress. You may search on Google and find out the best plugins to create your online portfolio.
So, enjoy yourself and have fun!