It depends on what you want to do! I love my computerised Celestron Nexstar alt-azimuth mount, it is perfect for visual observing, but if you want to get into astrophotography you are limited to single exposures of less than a minute or so. But I have taken many fine photographs using that mount. For longer exposures you will need an equatorial mount. But getting started, an alt-az mount will keep you happy for a good few years as you learn the ropes.
But don't automatically try to follow every piece of advice you read online. Whether you go alt-az or equatorial, the quality of the mount