To some degree it depends on whether you want to specialize in a few skills or be well-rounded in a number of them. So, for example, you might consider training skills other than Dex-based skills (since you already have a bonus here) so that you have a better chance of success at a wider range of tasks. Then you just put your Expertise in Stealth and Thieves' Tools. Or something like that.
If your party has someone with good Perception already (a Wis-based character, for example with training), then you might be able to skip Perception and focus on Investigation. The good Perception character spots the traps and you figure them out and disarm them. If you have a good Investigation character in the party, you might be able to skip that too. Teamwork for the win - you don't have to do it all.
I do recommend training at least one social interaction skill so that you can contribute to social interaction challenges - Deception, Insight, Intimidation, or Persuasion.
Some of this also comes down to how your DM handles skills. Is the expectation that you'll be asking to make checks? If so, then specialization in a few skills is probably better than being more well-rounded. If you instead just state tasks and try to avoid rolling, then being well-rounded might be better. It depends really.