SEO optimization. Suggest a list of top-priority landing tasks?

Question

Search Engine Optimization

Hi all. If you have time, please indicate all the obvious mistakes in SEO and what needs to be done first of all so that the search engines "make friends" with the page.
https://surveybot.me/ Survey constructor
Don't pay attention to the design (this is in development), the main thing is semantics. If anything, I can pay for your time.
Thank you in advance!

Answer 1

Of course, I am not an expert, in my opinion, indexed content is not enough for SEO.

Answer 2

1. I would add content for indexing;
2. I would add H2 headings (no more than two or three);
3. I would glue the pages https://surveybot.me/?lang=ru and https://surveybot.me/, because they can be recognized as duplicates (in any case, the Netpeak Spider report gives me confirmation of this assumption).

Answer 3

Critical.
Here sql injection is possible if you promote https://surveybot.me/ ' !!!
Lots of duplicates. For example. https://surveybot.me//
1.
Remove duplicates
2. Get together
3. Cluster
4. Develop a media plan
5. Create pages
6. Develop a link strategy
7. Engage in usability
8. etc.
If you need help, we can write on skype

Answer 4

Landos for context, organic traffic should not be counted on if the niche is more or less competitive.