You might get suggestions from those who are knowledgeable on the topic yet not subject to the Slitherine Secrets Act if you specify the exact timeframe of interest to you.
In the meantime,
FWIW 2 Generals is one too few for a starter 600 point army. Having an Inspired Commanders is very handy with Undrillled troops, and a Tactical Commander to fight in the front ranks, so that's 80+35=115 points there. Paint or borrow another TC at 35, which in all costs you 150 points for commanders.
From a passing unofficial comment in this thread on Vikings
viewtopic.php?t=8016
HF, Armoured, Superior, Heavy Weapon for Huscarls @12pts
HF, Protected, Average, Offensive Spear for Select Fyrd. @7pts
HF, Protected, Poor, Offensive Spear for Great Fyrd. @ 5pts
(All Undrilled)
So, improvising from what you have, and assuming a rough split of the Fyrd, 650 points could use all your miniatures as follows:
6 Huscarls 72pts
6 Huscarls 72 pts
4 Huscarls (useful for rear support/reserve for Huscarls (or anybody)) 48 pts
8 Select Fyrd @ 56 pts
8 Select Fyrd @ 56 pts
8 Select Fyrd @ 56 pts
8 Great Fyrd @40 pts
8 Great Fyrd @40 pts
10 Great Fyrd (Hordes, counting 1 base as double-based) = 50 pts
Terrain for Ancient British is Agricultural, Hilly, Woodlands, so use that.
150 points is enough to pull an ally contingent from another box.
Also, if the Great Fyrd could qualify for Avg that picks up 52 points, another TC would pick up 35 more points. Some archers would be appropriate and be reasonably cheap.
Bear in mind that 8-base BGs are often most shrewdly used on a 3-base frontage to be able to absorb losses without losing effectiveness.
Mike