My favorite is LTspice. Easier to use than any other simulators I've tried, and backward compatible with most other spice versions. There are models online for almost anything. Very popular, large community, easy to find online answers for any problem, plenty of tutorials, books, videos, etc. Very well maintained by top professionals (Analog Devices) and often updated, rock-solid and no bugs, works with Windows, Linux (through WineHQ), Mac, easy to share schematics (attach the .asc text file), free for personal/home use with no performance limitations, no ads, no buy-me nagging, can be called from Python to automate schematic creation/run/results postprocessing, works entirely offline, doesn't expire and doesn't need any license or account. Probably the best SPICE out there. Highly recommended.
Sometimes I also use QucsStudio, because it has live sliders to adjust components values, like this:
though, QucsStudio is almost unmaintaned (one developer), and the GUI style is from QUCS, so more cumbersome, even more cumbersome than TINA-TI.
Whichever you'll choose, don't expect them to be intuitive, or eye candy. That's valid for any CAD/EDA program, in general. They all require some learning, then practice. It's a steep learning curve, but once one is fluent with a simulator, that will be an invaluable skill, particularly for learning, and later for design.