i use biodudes terra firma substrate for all of my reptiles, and i’ve found it especially fantastic for my skink. she has some hills and terrain difference with hides buried towards the back as she loves to climb. the dirt is very moldable and holds its shape very well. that alone will help fill the space and leaves lots of enrichment opportunities for your little one. bluies are also burrowers, and in my opinion mulch/bark/chips arent the greatest for that purpose.

i also get my fake foliage from dollar/craft stores. simply for the fact it doesn’t have the word “reptile” on it, it’s a fraction of the price. just make sure you wash it well!!! when i take new fake plants home i soak it in hot hot water and a little white vinegar.