In any mobile phone digital distribution service whether app store or play store, it's easy to recognize a fake to the original. Check reviews, number of downloads, the developers, check the link of the app, using the "share" feature in the upper right, mostly the URL is simply written with its website "play.google.com/.../?id=io.metamask", fake ones have different characters on it. Also check the app website if it redirects on the same play store page.
Use adblockers either on mobile browsers and desktop too, firefox has lots of security features, mobile or desktop, just enable it and use "strict".
These are some good facts to observe and put into consideration. Though in my watch on downloading anything from Google play store, I don't miss the review and number of downloads. I don't download much with a PC, as I prefer the mobile phone as more friendly with mobility.
If you are newbies in crypto, first two websites you can use to search for projects and related links exclusively links for website. If you are careful, you can double check given links from them with links from search engines (Google, Bing, Duckduckgo, etc.)
Above are first good steps to do but not enough. In crypto, don't trust, verify. After you download a wallet, you must verify it. What is purpose of wallet verification step? To check and make sure the wallet you download are real, not phishing one. Don't trust given link from any source, always verify it.
I have been using these two websites, mostly CMC for price and some newly launched projects. I also use it to get the projects official website, and the exchange at which the project is listed. I think what I need to do is to be more observant than before.