Meanwhile, I just hope for Tasha's custom ability scores and proficiencies to officially be in the game 😅

There is indeed an entirely customizable variant human (which is in the PHB) : http://dnd5e.wikidot.com/human

This keeps the "flexible"/"versatile" aspect of humans, but is far better and this seems to be the consensus among the D&D community, for instance :
- https://rpgbot.net/dnd5/characters/races/human/
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The vast majority of the time that you play a human, you’re going to play a variant human. +1 to two ability scores means that you can increase as many important ability scores as the standard human in almost any build (Monks being a possible exception), but you also get a free skill/tool proficiency and a feat. Since this is the only way to get a feat at first level and the only way to get a feat without giving up potentially crucial ability score increases, the variant human is a hugely popular option for players who want to make us of feats.

Much of this guide will draw comparisons between the standard and variant human, but to be clear up front: The variant human is better in all but the most novel of builds.

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The Human is notably the only race which is not significantly changed by the Customizing Your Origins optional rules. The Variant Human can trade their skill proficiency for a tool or weapon proficiency, and you can replace Common as a language proficiency, but that’s all that changes.

- https://arcaneeye.com/players/dnd-5e-races/human-5e-guide/#variant
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Many believe that the variant human is the best race in all of D&D 5e, and we tend to agree. Variant humans get ultimate flexibility in their ability score increases, a free skill proficiency, and a feat at 1st level. This makes them one of, if not the best option for nearly every build because they are completely customizable.

Ability Score Increase: Most races get three total ability score increases, but the variant human only gets two. The upside here is that you may assign them however you like, as long as they are two different ability scores. This means that every class will be able to choose the best ability scores for their purposes.

Skills: Typically, racial features that give you a choice of a skill proficiencies let you choose from a short list. The variant human lets you pick any skill you want, ensuring that the skill is never wasted because you can choose a skill that your character will actually be able to use effectively.

Feat: Getting a free feat at 1st level is very powerful and is unique to the variant human. Certain builds require one or more feats to work, so getting it early and not having to sacrifice an ASI on a level up helps tremendously. Even builds that don’t necessarily need a feat will always find something interesting to complement the character.