You can get a trial for the non-indie version of MODO (with some extra features like scripting and stuff that you’ll likely not use when getting started anyway) on their website. It’s always good to try it out before you buy it.
Also Blender is still a good program, it has lots of cool features and does pretty much everything you need, but it’s just not the most user friendly and intuitive thing ever. It should by now work just fine with UE4 too.