If you are selling physical products without publishing written content, it will be nearly impossible to get any good ranking in search engines by having more backlinks. Backlinks are also only worth it if they come from big sites that actually publish content related to your products. Getting them is possible in theory - by reaching out to them - but to get them to link to your products, your products need to be valuable for their audience, which is hard.

That said, your post is not specific enough to give any good advice.