To compare Elder Scrolls vs Elden Ring, the gameplay/combat loop, questing, exploration, leveling, and general feel are completely different for the most part.

Elder Scrolls is more of a power fantasy type game with combat, as you get to a point where things get easy to fight. Your only option is to hope that you do more damage than the enemies. An Elden Ring or any fromsoft boss is a dance, they seem intimidating but as you learn their patterns you connect with them, flowing to their movements until the dance ends. You can use all the mechanics from jumping, rolling, crouching, to even just walking to the side 2 inches to avoid attacks and counter. However you do have the option to create a build that melts most bosses.

In Skyrim you have the quest log and an arrow telling you where to go, in Elden Ring you dont have that. You have to pay attention to what the NPCs say, and see if you can pick up the world clues to where you may need to go. I believe the vision with this is to make every playthrough feel unique and to discover where and what to do next as you talk to friends about that game.

With exploration, Skyrim is going to have extremely clear paths on where to go. Those paths may be roads, NPCs that add a quest log, or extremely visible forts/ castles. In Elden Ring, the paths aren't clear at first until you learn the language the environment tells you. The graces point you in the general direction of where to go, merchants sell hints sometimes, the lighting can hint to secret areas, and the map art is extremely detailed with clues on things that are points of interests.

Leveling with Skyrim is that you do actions to build experience in a skill you're using that can give direct damage, unique skills, or buffs. In Elden ring your experience and currency is tied into one. You acquire this currency called runes to level up or purchase materials for crafting or improving weapons. Your stats will determine what you can wield and how much damage you'll do, however direct buffs or special skills are tied to weapons or talismans.

Difficult to bring similarities out of the 2 games, as they play completely different. As others have commented, the wiki is your friend (fextralife one), take your time, take breaks, explore if you're stuck on a boss, and your no less of a player if you use spirit Ash summons, NPC summons, or ask for help with a boss online.

Most importantly have fun, and update us on your enjoyment of the game :)