Simple optimisation wix website- structure, navigation, mobile menu

Hi, my name is Alice and I have recently started a real estate business. I sell luxury homes to international clients. I have created a cool website for it using Wix. I like the graphics and the overall appearance of the website, I think I did quite a good job. However, I had never created a website before so there is surely a lot of room for improvement. The main problems I d like to solve here are related to mobile versions menus, structure, navigation, loading times and, minimally SEO. I say minimally because I know that, when it comes to SEO, I need a long term strategy for which I will soon make arrangements with an agency. I would like to find somebody who knows how to use WIx realllllly well and who could improve the following aspects: - improve the structure of the website so that it becomes even more intuitive and easier to navigate (3 clicks rule does not always work with the current one..) especially when it comes to homepage - find a better solution for multilingual mobile version menus (apparently wix does not provide drop down navigation menus in multiple languages and our website features 2 languages. We were forced to give priority to one which makes the other mobile version quite confusing to navigate). I d say this is the main issue. - loading times-> there are a lot of high resolution pic and sometimes loading can take a while - insert ALT attributes for all of the images - some help inserting keywords-> I have found some but need help inserting as it takes quite a long time - check that keywords are properly placed in headlines, subheadings and anchor texts - Build in feedback forms and other channels of communication in appropriate places so customers can provide feedback, make a request, or ask a question. I m open to talking about any other suggestions which would make our website look more professional and easier to navigate. Thanks