Develop existing wordpress site

Site already exists and is live but only wordpress template. Require client portal, integration with stripe account. Expect to use woocommerce and wp-client or sprout-invoices whichever makes sense, looking for recommendations. User portal should have all the typical functions, change credit info, user profile, subscription changes, invoices, etc. Very typical client portal nothing special. Client should be able to sign up for subscriptions already on site and register and pay for them etc. Would like mostly out of box (use plugins/) and whatever configuration/integrations required. Also one extra section in client portal where client can enter multiple user names depending on how many licenses he bought. This can be plugin/module or custom. Looking for expert who knows what plugins/modules to implement to do this simply and without much customizations