Hm, I would encourage you not to memorize the kun and on readings of the kanji out of context, because it’ll be really hard for you to apply the readings when you memorized them in a certain order. You should also know when to use kun/on readings (Kun: one-word nouns, one-word verbs; On: compound nouns, ~する compound verbs)
Since you just started learning Japanese, I recommend you start with Hiragana and Katakana, because relying on Romaji is a really bad habit that will make it impossible to read real Japanese. Once you know Hiragana and Katakana like the back of your hand, you can move onto simple Kanji, and then build up from there. Here are a few resources to help you get started with Japanese:
- Japanese Learning Resource masterpost
- an ask I answered previously about Kanji
- I highly recommend Anki for Japanese Kanji and vocabulary. Here’s a guide to using Anki if you’ve never used it before.