Where to get started on modifying a k24a4

So I’ve had this 2005 Honda accord with the k24a4 for a while and I’m wanting to start learning how to modify engines and see what parts give the most power. Any ideas on where to start and what parts, websites, or brands to go for this specific engine? I want it to be a bit of a budget build but also have a nice little boost in power compared to the ~160 the engine comes with. I don’t really make a lot of money but want to see if I can add a modest boost in power on a budget.