As for the toddler care - I didn't buy the high chair this time at all. Instead, I bought some vegetable seeds, opened them and then fed my toddler a couple of veggies every time he got hungry (not only is this fast, but also gives a +1 happiness).
Ohh that's smart, I wasted plenty of time putting ham sandwiches on the high chair then letting my toddler be trapped in there.
Alright, grand strategy: Ignore the poor kid.
I gave him the independent trait so he'd make better use of his alone time. Gave him some blocks and a car toy, and invited the club over so he could develop social.
Optimized lot traits, gave my toddler a room with a bed, gave myself a room with a reliable computer and a chess table. Traits were Genius, Cheerful, and Evil (my child was never happy, so it worked out). Had Good Timers all the way through to first increase the Programming skill speed then to max my Focused vibe. Decided on programming because that's my real-life job, and overclocking won my heart (+4 focused is a tad OP, don't you think?).
In the beginning while I was getting my Programming club perk, I did potty train my toddler once and did Teach Shapes with the blocks for a little, but after that, the only times I left my room were to feed the child and to Rally the Troops, and to cap off one of the skill levels right before his birthday.
I did the REDACTED gig when I could and otherwise aimed for the website page ones. I did do 2 apps and 1 game when those weren't available; hacking was okay too.
I had this weird bug where my gig list (only for programming) would reduce to like 3, which first happened after I overclocked my computer and occurred a couple times later, but doing all of those seemed to temporarily fix it. Idk, it was weird and a pain, the internet told me to just reset the sim but it didn't work, so *shrugs* I dealt.
I did the same thing as others having my kid in the club, (throwing in some monkey bars for movement, a toddler toy for creativity, a teddy bear for social, and a science table for mental) and he did it all himself. Even let him go to school if he was on track instead of locking him in a room like my practice run. He totally lit my monkey bars on fire after I left them in the science table blast radius.
Won't be doing that again lol.
I think the main reason my score was so high was because I didn't bother training my child at all and focused on maxing my career bar over and over to get bonuses and up my gig payments. It got me to a higher income level for a longer amount of time, so then I was making bank that well overrode the toddler multiplier bonus that I missed out on.