I would suggest looking at some Legend decks you'd like to play, then see if the deck creator has a Twitch stream. Check out their past recent broadcasts while they're playing that deck, and learn from them. Most "pro" HS streamers explain their thought process while playing, you can learn a lot.
Keep in mind every deck usually has a hard counter, so don't feel bad losing if you're up against yours. At best a Legend climb is a 60-70% win rate, and a lot of that is the luck in your matchups. These sites can help you with decks (also this one too I guess lol -- has a more refined search feature):
Also if you're a little burnt out and don't have the funds/gold/dust for the deck(s) you'd like to create, I'd suggest learning the arena. On average, getting 3 wins will give you a pack + ~50g (covers your entrance fee -- no loss of gold), and 7+ wins gives you ~150g + a pack (can keep going and going getting a pack everytime). There's also good arena streamers that walk through their play.
I would suggest looking at some Legend decks you'd like to play, then see if the deck creator has a Twitch stream. Check out their past recent broadcasts while they're playing that deck, and learn from them. Most "pro" HS streamers explain their thought process while playing, you can learn a lot.
Keep in mind every deck usually has a hard counter, so don't feel bad losing if you're up against yours. At best a Legend climb is a 60-70% win rate, and a lot of that is the luck in your matchups. These sites can help you with decks (also this one too I guess lol -- has a more refined search feature):
https://www.hearthstonetopdecks.com/deck-category/style/ladder/
https://hearthstone-decks.net/standard-decks/
https://hsreplay.net/decks/#sortBy=winrate (sorted by winrate, shows from rank 25 - Legend so it's not as accurate as rank 5 - Legend/etc)
https://old.reddit.com/r/CompetitiveHS/ (sometimes a really well written guide is posted with matchup strategies, mulligans, etc)
Also if you're a little burnt out and don't have the funds/gold/dust for the deck(s) you'd like to create, I'd suggest learning the arena. On average, getting 3 wins will give you a pack + ~50g (covers your entrance fee -- no loss of gold), and 7+ wins gives you ~150g + a pack (can keep going and going getting a pack everytime). There's also good arena streamers that walk through their play.