Typically, you only tap your own permanents when they attack, or when you activate their abilities
Many planeswalker decks spam tokens for protection, so theres nothing wrong with creating more bodies
You can go far by just focusing on things like balance, mana curve, and card advantage
The secondary ability to grant +1/+1 counters on Obuun is easily the weakest component of the card and will likely be used just to pump itself so granting bonuses for all your creatures with +1/+1 counters will likely just become give this bonus to Obuun. Despite this, among the creatures there are some wonderful inclusions that try to keep this deck afloat such as Omnath, Locus of Rage, Rampaging Baloths, Admonition Angel, Emeria Angel and Mina and Denn, Wildborn
In addition to those options, collectors and hobbyists alike can purchase the Illumineers Trove, a package consisting of one storage box, two deck boxes, eight booster packs, 15 game tokens, and a players guide