Thanks for the advice Elliot. Throughout the process, I've been open about my technical skills with my manager, but he keeps saying he has full confidence I can get it done; without any real advice. Luckily, its more of an independent internal project that replaces a process that's more manual right now, so it doesn't affect anything else.

Yes, the next cycle is more related to what I do, but I don't want to get a reputation as someone who can't get stuff done; it's just that I feel 6 months is not enough time to learn a completely new language, especially when it took 3 months just to figure out the project requirements.