Welcome to SSWT, Vicky! Glad to have you here.
Sorry to hear about your job loss. As far as products about making money online there are a lot of different views. I personally choose to follow what Lynn (the owner of this forum) teaches.
The best thing for you to do is read Lynn's blog post about . This will give you a lot of help on getting started.
As far as starting a website, it depends. You might be able to just use a blog (wordpress.org) which you'll be able to do once you sign up for hosting that has a cpanel. Lynn recommends Host Gator and has a link in the post above to sign up.
As far as promoting several different products, if they are in different niches like one is health and one is stuff for dogs then yes, you would need to different domains and make those totally separate sites. BUT it is recommended that you choose one niche to work through until 'completion', that is until it's making the $ you are looking for and then move on to add another niche.
We'll be happy to help you through the process. And your English was just fine