if you have a particular tradition you are working in, and a particular instructor, and if you have conviction in those, then as Ben pointed out earlier, the best option might be consulting them first. But I will offer some modest insights from a fellow traveller, for what it's worth.
Jhanas 1-4 are just 'limb number eight' of the N8FP. It's good to remember that we need all eight 'limbs' to be developed in tandem. I used to focus too much on my daily sitting meditation in a way that was out of balance with the other path factors. That's one thing to remember.
As for jhana, I'm getting the idea lately that there needs to be a gradual but real 'whole lifestyle shift' for it to become part of our lives. Take a look at the 'Samaññaphala Sutta: The Fruits of the Contemplative Life'. Now I cannot pretend to be following everything in this sutta in all it's details, or else i would be a forest monk with few possessions, and not a householder with two kids to look after! But there is this well-known sequence / order to things. First the Buddha describes the perfecting of Virtue, then
sense restraint, then
Mindfulness and Alertness, then
Abandoning the Hindrances, and then
the Four Jhanas! I notice this kind of order elsewhere in the suttas, also (eg, Virtue -> Jhana -> Insight). I don't know if the Buddha is saying we have to perfect each one before moving on to the next, but possibly that we need to give importance
to all of these things if we really want to practice jhana / Insight, and that the previously elucidated things (virtue, contentedness etc) are supports
for jhana practice.
So I respectfully ask, how's your virtue?
How's your mindfulness in all activities,
throughout the entire day? How content
are you? I'm not saying type an answer to this here hehe, just that this is how I am looking at things myself now. I'm asking myself those questions through the day, trying to develop all eight limbs of the Noble Path as best as I can (and it's a pretty humble level but better than nothing at all), and not letting the morning meditation sit be this huge thing that I get too obsessed with. Will it be blissful? Will it be frustrating, or boring? Will it be painful? It's been all of these things, and will be again, ime! But I believe that more balance
in the whole of our life, would also very positively affect that time we do spend on the meditation cushion. As for the tingling, I say just enjoy it. But remain mindful and alert through it. If your mindfulness gets lost, then you need to work on that.
Hope something here was of assistance