Hey there! So, if you're looking for some ins and outs to getting comfortable with splinterlands and transferring assets in/setting yourself up for success, feel free to check out this introductory guide I wrote a few days ago, it covers a lot of the common questions I see get asked (and the questions I had when I first started)!
If you're looking for less of a deep dive intro to the ins-and-outs around Hive/Splinterlands/etc, you should check out a few of the posts written by @marcuswhal, he has a great Beginners budget deck building guide as well as more recent examples of decks he's used to climb up the ranks :)
Hope that helps!
Cheers!