Research is only useful if it ends in a decision. What you're describing is a very common trap for small online business owners: browsing Sellvia, DPLR and PLR.me feels productive because you're learning, but nothing changes in the shop at the end of the day. The fix is to treat research as a task with a deadline and an output, not as an open-ended activity.
Put a box around it Give research a fixed slot, say 45 minutes on a Friday afternoon, and write down the question you're trying to answer before you start. "Should the store sell digital products at all?" is a far better question than "what's out there?". When the timer ends, write one sentence: yes, no, or test. Then close the tabs.
Answer the digital products question cheaply You've already half-answered it yourself. Rather than researching more, run a small test:
- Pick one or two products that sit naturally alongside what you already sell.
- List them for 30 days, mention them once to your existing customers, and see if anyone buys.
- If nothing moves, drop the idea and stop thinking about it.
Two things worth checking before listing anything: the licence terms on PLR content (some restrict resale on marketplaces), and that your checkout handles VAT correctly on digital goods if you sell to EU customers, since the place-of-supply rules differ from physical products.
Protect the morning Do the to-do list items that bring in money or serve existing customers before anything exploratory. Three items, done before lunch, beats a list of fifteen. Keep an "ideas" note somewhere so interesting things you spot get parked rather than acted on immediately.
The honest test for any new idea is simple: would it generate revenue in the next 90 days? If not, it can wait. Most small stores grow from doing the boring things consistently, not from finding the next product category.