If you're interested in online marketing, setup email software and create a lead magnet that you can use in your sales funnel. Then, build up that list. It's often said that you can expect to earn about $1 per subscriber per month. If you have a list of 10,000 subscribers, that means you can earn roughly around $10,000 per month. You will need to deliver value and not pitch them on every email, but it is a very achievable goal in a short period.

StackPath – CDN with 31 additional data centers (Cloudflare has 150+ data centers, but more data centers = faster content delivery). I get around $1,000/month by referring people to StackPath in my cache plugin tutorials. StackPath recently bought MaxCDN and their affiliate acceptance rate is much lower (depends on your potential volume) but most cache plugins converted to StackPath as their recommended CDN
While some might think that starting a blog is an arduous effort, when you understand the precise steps you need to take, it becomes far easier. It all starts in the decision of choosing a profitable niche and picking the right domain name. From there, you need to build your offers. You can easily sell things like mini-email courses, trainings and ebooks.
Be professional. When you submit a résumé, don’t type it in ALL CAPS and please don’t avoid the caps lock like the plague. Know how to use it without looking incompetent. Write in complete sentences with proper grammar. Of course, there will be exceptions, but even with the exceptions, you must keep it professional. You’re building their view of you.

If you're serious about making money online, start a blog. Blogging is one of the easiest and most sustainable income sources. As long as the blog is setup the right way, in the right niche, with the right content targeted at the right audience, and the offer is complementary to the content, you could make a tremendous amount of passive income from a blog.