Overall, you are inclined to remain with the girl; your gut feeling tells you she is a nice girl, one that will take good care of you. However, you're not so naive as to not expect that this perception of yours might be wrong, since you've only met her a few hours ago.
Yet, despite that risk, remaining with her still sounds far more appealing than leaving her: no matter where you would escape to, it would mean a life of daily struggle, one where you would need to scurry around in the shadows and tight spots to remain as hidden as possible, while searching for any scrap of food or useful materials you might need to survive, with very little if any time for you to enjoy yourself. In comparison, it would likely be a lot easier to remain with this girl who provides you with direct access to tasty and nutritious sustenance through her milk, and a warm and comfy place inside her breast, all in return for just squirming and licking around her insides to make her feel good, a situation that even though you learned it would be difficult, any "failure" would never be life-threatening so long as you obeyed her.
In other words, both are lifestyles where freedom would be minimal in one regard or the other, but only in one, you would need to struggle to survive every day.
Yet again, all this is assuming this girl is gentle, for if she turns out to be rather demanding or worse, cruel, staying with her might prove utterly unbearable to the point of making the daily struggle of scavenging life preferable by defect. Thus, you want to be cautious, and what better way to be cautious in your context than knowing about any escape attempt that might become necessary if things turn ugly can succeed?
Therefore, your mind is soon set on what you have quickly grown to call a "partial" escape plan, one where you do exit her body, but don't run away from the giantess, choosing willing at that point to remain with her unless the situation gets bad enough to justify a full escape.
With the matter of what's the most immediate step in your journey to get to know more about your new context and how best to adapt to it solved, another matter requires answering: how soon will you want to attempt this partial escape of yours? Since your final goal is just to find if an escape attempt can succeed while in the end remaining with this girl, attempting it while she's not in the mood might spark unnecessary tension between you two going forward, but also attempting it while she asks to have fun with you and thus focused in each of your actions might make it harder to succeed any attempt of yours. Lastly, if you want to try it at a time such as this, where the girl is currently unconscious yet erratic, it could provide its own set of challenges, especially if you want to attempt it another midnight instead of right now.
How do you proceed?