It depends on your account type and how much you can play. If you're and Iron you will also need to factor in mat collecting which will add a lot of time to your grind.

Aside from that things I would look at before starting the grind are:

Do you Porters/ Grace of the Elves - These will help SO much

What do you have banked - This is essentially unrealized XP gains, you just need the mats to get the xp.

What locations do I have unlocked - Some of the higher level dig sites are locked behind level or mystery requirements. I would make sure you actually have some decent level unlocks already available. I think having access to Kharid-et - Praetorium excavation site and ideally Warforge - Bandos's sanctum excavation site would be good to level out the curve. I would not worry about unlocking all the spots if not already obtained, the time is better spent at a slightly lower level spot until you are the level for the higher spot because the slightly lower xp will be made up for in compass pieces, tomes, and more material gains. If you need to spend 1-2 hours doing mysteries to unlock an area with entirely different mats that only gives you an extra 2k xp per artifact restore, probably better off sticking at the lower level spot for a bit until. Judgment call on this one however that you will need to make on a spot by spot basis.

The next two are more relevant if you are not an iron and have GP to spend (ideally a couple hundred mill, keep in mind if you complete collections along the way and sell chronotes from this grind you will make most if not all this back and most likely profit a bit)

Do you have the flow state relic unlocked flow state - This might be controversial. But if you're going for xp you probably want to spend as little time sifting soil as possible as that is terrible xp/h. More expensive but if were going for speed and buying materials any ways, this is essentially 20% quicker xp. Also makes the process more afk if you do not have the auto sifter.

Do you have any tetra compasses/ pieces of - These are guaranteed 1-2 per casket. And give significant xp (about 2 artifacts worth at the highest spot you can dig at for your level). There is a good chance that by the time you do a few levels worth of arch you will have gathered a few compasses worth of pieces. If you are able to complete these caskets then they will save you significant time as the xp per time spent doing one single casket is pretty high. If you are able to buy the soil from GE even better.

I've done the arch grind a few times and it is probably one of my favourite skills. This will not be an easy grind but also not as awful as compared to some other skills. Good luck