Find paralogs in a draft genome
This is really tough to do with highly heterozygous animals. What are your genome assembly stats? Specifically, what is your number of contigs, scaffolds, assembly size, and the N50?

If you have proximity ligation data it will be easier to determine if potential paralogs are truly from different regions of the genome or are just from homologous locations on sister chromatids that ended up in uncollapsed in your final assembly.

If I were you and had a good genome, I would start by annotating gene models using RNAseq data, then blasting each gene in the model against all genes in the model. This would give you potential paralogs to start looking at more closely.