So, start small and then move onto bigger things if things look promising. Use something like Dokku for easy deployment if Ansible or others are too much work. Every little bit will help when you do need to scale.
The whole point of the article is that those items are completely beyond many devs. Yes, you could learn to do it yourself, but its just so much easier to get started with a service like Forge.
It's a matter of choice, you can spend some extra money and have those things handled for you or you can save it and do it yourself (perhaps just once if you use some config management tool to save your settings).
P.S. It's also worth asking oneself, are these things really required for my small, personal projects? Perhaps they aren't and you can save yourself both time and money.