Welcome on board Arturo.

1) Arastta has started when OpenCart version was 2.0.1 so you should install those themes, extensions etc.

2) I don't think that any SEO module will work as Arastta ships with advanced SEO features within the core which means there are huge changes there.

Here you can find more info about the OpenCart compatibility: https://arastta.org/docs/developers/opencart-compatibility

Regards

Also, don't miss these articles about Arastta SEO:
https://arastta.org/blog/getting-started-seo-boosted
https://arastta.org/docs/user-manual/system/settings/seo

Thank you.
The templates I saw after that was based on opencart 2.01

I see Arastta is best cms, which Opencart in SEO, but a module such as those discussed in another post would be necessary for us to sell an SEO package to our customers which includes the module in the price, but other search services of words key, etc.

For now it is a little early to make the change, but I think at the end we will, the improvements are remarkable, continue testing, very necessary modules for us as suppliers of imported feeds and as commented the SEO.

If you need any help ask my programming level is not very high, but I can help you in other things, I'm from Barcelona, Spain can help in translation and in Spanish forum which allows my time.

Hello Arturo,

The SEO of Arastta is far better than OpenCart. We would appreciate your help in translating Arastta. Here you can join:

https://crowdin.com/project/arastta

Regards