Hi @jct1111
Welcome to the community. And welcome to world of scammers 
There are so many scams that it’s really hard to trust someone, or to give a chance to a real developer who is looking for honest work.
First, think it like this. Have you posted a job offer or posted about some problem anywhere? If the answer is no, then let’s think more, did that SEO strategist just stumble on your store or does he have some script to track new Shopify stores and try to offer services? Well, most likely it is the second option. Now is it a scam or han onest offer? See if it has a credible online presence: does it have a website, is it a Shopify partner (https://www.shopify.com/partners/directory), and does it post here in forums? Also, there are a lot of good developers from Pakistan and India, but… a lot of scammers do come from those countries, so one warning flag. And you did a good thing to try to make a video call, that is always a good sign of what the final answer. Think, if you really need a job, you would make 15 minutes for a quick call just as an introduction and to set up the next meeting at least, and not to make excuses like “seminar”.
So yes, a norm for a scammer
There are a lot of those here on forums; they relentlessly try to get new clients, or, better to say, victims every week. Because they do take money for doing almost nothing, fixing something that is not broken. And how they do it, they make 10- 15 random posts, like replying with Chatgtp and not contributing to a real solution, but have a message " Contact us on email for more." What more?
And that is, btw again forum rules, but who checks that. Then make contacts through Telegram, WhatsApp, Instagram, promise 40K income a week but end up just scamming, maybe taking customer info and money and then disappear and make a new social accounts and to it again and again. There are others that will maybe find security issue with your computer and then hackers and offer anti-virus subscriptions… but that is just one example.
One story to share, we were active on Upwork looking for a developer, and from maybe 50 profiles with good reviews, there was not a single one that matched the profile image and country. You see people from Eastern or Central Europe, but when you get on a call, it is clear that they are from China, India, and Pakistan. Also “experts in Shopify”: " Well, I did not write any code in Liquid, but I have read about it" 
So watch out, search before any action. If you do have any question do ask it here, or watch for AMAs, they are frequent now with real experts, agencies and developers. And I do advise spending a bit of time learning at least the basics of SEO, it could be helpful in the long run.