i mean i am going to kill the magic here for a second because i don’t wanna, like, actively deceive anybody as to what i believe & think: no sites are reliable. the original 15th-century italians are not reliable. tarot cards are not reliable! they are made up.
tarot cards are cool because a) they’re medieval fortunetelling, which is really neat; and b) they’re a really, really effective way to sort out your thoughts. people sometimes say “oh, they’re deliberately vague, they’re designed to apply to any random situation”; this assessment is completely accurate. it is a feature, not a bug.
what tarot cards are useful for is allowing you to listen to advice that you wouldn’t be willing to hear from yourself, or allowing you to turn what you think is a confusing and weird and incomprehensible problem into a clear, simple, solvable narrative. the act of asking tarot cards a question forces you to clarify what’s going on in your head and your life. that’s inherently valuable as an act.
(it’s also weirdly comforting to know that 15th-century italians had, more or less, the same little triumphs and obstacles that you have today: you’re not being recognized for your hard work, you’re spending money too much or not enough, you have an important test coming up, you’re feeling pleasantly nostalgic, someone is lying to you, you can’t seem to shake off your grief, you just found something you thought was lost, you’re confident, you’re overworked, you’re loved, you’re lonely. seasons change but people don’t, etc.)
this is not to say that i don’t totally respect people who believe in using tarot cards as a legitimate tool for divination! i think that’s totally cool! but i wanna make it totally clear that i don’t share that belief, and for that reason, any answer i give to this question is going to be “you can more or less make it up as you go along and it’s not actually going to make that much of a difference re: accuracy.”
so in that light, these recommendations are not so much reliable sites as useful sites; they contain lots of information on different spreads, ways to read the cards, reversed and upright interpretations, etc. is some of this information made up by the authors of the sites? sure. but that doesn’t mean it’s not worth writing down, memorizing, and using in tarot readings.
tarotlore is pretty fuckin’ rad when it comes to tarot card meanings: it has excerpts from a.e. waite’s pictorial guide to the tarot as well as some other well-known tarot books.
learn tarot is also great; i’ve linked you to the page that shows each individual card, and here’s one that gives you a guide to celtic cross spreads.
psychic revelation has a shitton of possible spreads you can use, which is great.
tarot: the royal road is far and away my favorite tarot site of all time. it contains not only long, involved entries on each card, upright and reversed (including associated herbs, runes, dates, astrological connections, and numerological connections) but also ways to interpret the cards in conjunction to each other— the two of pentacles next to the ace of wands may foretell an upcoming opportunity for a new job, for instance. this is rad shit.
hope this was helpful!