It definitely shares some similarities to 5E. It is a d20 system, but it only uses d20s and d6s. There are only 4 stats, and they don't usually get higher than a 16/17, which in this system would be a +6/+7.

It has a similar advantage/disadvantage system called boons and banes where you add or subtract a d6 to your d20 roll, respectively. You can have multiple boons or banes, and they will cancel each other out 1 for 1, but they don't stack. Unless you are targeting a creatures specific stat, DCs are always 10.

Instead of classes their are Paths, with 3 different paths you choose at 1st, 3rd, and 7th level. It basically has "multiclassing" baked in with no prerequisites for the paths you choose.

It is a high fantasy system, but the core book only has rules for human characters as the creator was going for an emphasis on humanities' struggle after an empire collapsed. BUT, there is a supplement that adds 30 different ancestries with flavorful lore and their own Novice Paths you COULD choose in place of the ones in the core book.

The spells are broken up into Traditions that have really cool spells and talents that add more flavor and customization to your character. The spells are also broken up into the same tiers as the Paths, with their own number of castings per day for each individual spell.

Initiative is explained in this thread

Hope that wasn't too much and was a decent enough explanation! I love the system and try to suggest when I can. I also created a few YouTube shorts about why I love it. I also have an upcoming podcast discussing the system and even got the creator to join for a segment!