Hexagram 64, Wèi Jì (Before Completion): Line 1
未济卦初六 · 火水未济 · 中文版
初六：濡其尾，吝。
The line (Legge)
The first SIX, divided, shows its subject (like a fox) whose tail gets immersed. There will be occasion for regret.
Small Image commentary
'His tail gets immersed:' - this is the very height of ignorance.
象曰：濡其尾，亦不知极也。
In plain words
Getting one's tail wet: regret. This hexagram is "before completion", with every line out of its proper place; the first line is weak at the bottom and tries to cross before it is able, like a young fox that wets its tail. The Small Image says it does not know its limits.
Applying it to your situation
If you are eager to start something you are not ready for, this line suggests weighing your abilities first. What are you still missing to be ready?
Position
A broken (yin) line in the first place, which is a yang (odd) place, so it is not in its proper place. Its partner is line 4; one is yin and the other yang, so they respond to each other.
If this line moves
With this line moving alone, Wèi Jì changes into Hexagram 38 Kuí (Opposition). The Jiaoshi Yilin verse for this change (Chinese): 焦氏易林·未济之睽.
A recorded case from Takashima
Wei Ji to Kui: taking over a business that failed before: A friend asked about a manufacturing business and received the first line of Wei Ji, "wetting its tail; shame". Takashima said it must be an old business he had taken over and revived without learning from its earlier failure, so the goods were not selling and he was stuck, like a little fox that wets its tail crossing the river; at the second line, "dragging the wheels back; steadfast, good", next year he should ship the goods by cart to other places and would profit.
The hexagram
Hexagram 64 Wèi Jì (Before Completion). The Judgment: Wei Ji intimates progress and success (in the circumstances which it implies). (We see) a young fox that has nearly crossed (the stream), when its tail gets immersed. There will be no advantage in any way.
Next: Line 2
English text: James Legge, The Yi King (Sacred Books of the East, vol. 16, 1882), public domain, as transcribed by the Chinese Text Project. Chinese: the received text. Offered for study and reflection, not as prediction. Plain-English readings and position notes by this site.